BIL - Bhp Billiton Offer For Rio Tinto6 Feb 2008
BIL
 BIBLT                                                                           
BIL - Bhp Billiton Offer For Rio Tinto                                          
News Release                                                                    
BHP Billiton Plc                                                                
Share code: BIL                                                                 
ISIN: GB0000566504                                                              
Number 07/08                                                                    
6 February 2008                                                                 
Not for release, publication or distribution in or into Japan                   
BHP BILLITON OFFER FOR RIO TINTO                                                
BHP Billiton Announces Offer of 3.4 BHP Billiton Shares per Rio Tinto           
Share to Create the World`s Premier Diversified Resources Company               
The Board of BHP Billiton today announced an offer for all of the shares        
in Rio Tinto Limited and Rio Tinto plc.  The combination of BHP Billiton        
and Rio Tinto will create the world`s premier diversified natural               
resources company with a unique opportunity to unlock value for                 
shareholders:                                                                   
-    Unparalleled exposure to the same key mineral basins will create           
significant value by optimising production efficiencies and delivering          
greater volumes on an accelerated basis to meet growing demand;                 
-    Creation of substantial value through quantified synergies and             
benefits which are expected to contribute a total incremental EBITDA of         
US$3.7 billion nominal per annum within seven years of completion of the        
Acquisition;                                                                    
-    Efficient development of the next generation of large-scale projects       
in new regions for the benefit of its customers, the communities in which       
it operates, and its shareholders; and                                          
-    A world-class management and operational team with strength and            
depth across all levels of the organisation with a commitment to the            
pursuit of excellence and the highest standards in safety and                   
sustainability and a focus on global best practice in community and the         
environment.                                                                    
This value will only be unlocked if the Offers are successful.                  
BHP Billiton`s offer will deliver to Rio Tinto shareholders:                    
-    3.4 BHP Billiton shares for each Rio Tinto share;                          
-    Approximately 44 per cent of the Enlarged Group compared with              
approximately 36 per cent based on the market capitalisations of the            
companies prior to the approach by BHP Billiton to Rio Tinto on 1               
November 2007; and                                                              
-    A 45 per cent premium to the Rio Tinto share price prior to the            
approach.                                                                       
The Offers contain a minimum acceptance condition requiring acceptances         
relating to more than 50 per cent of the publicly-held shares in each of        
Rio Tinto Limited and Rio Tinto plc.  BHP Billiton also proposes a buy-         
back of up to US$30 billion within one year of completing the Acquisition       
if its 3.4 for one offer is successful.                                         
BHP Billiton firmly believes that the combination creates value for             
existing BHP Billiton shareholders who will own approximately 56 per cent       
of the Enlarged Group.  Further, cash flow and earnings per share will be       
accretive from the first full fiscal year following completion (after           
adjusting for the proposed share buyback and excluding depreciation on          
the write-up of Rio Tinto`s assets).                                            
This release is intended to be a summary only and should be read in             
conjunction with the full text of the attached Announcement, including          
Appendices, where more detailed information about the Offers (including         
definitions) can be found.                                                      
Contacts:                                                                       
Australia                                                                       
Don Carroll, Investor Relations                                                 
Tel: +61 3 9609 2686  Mobile: +61 417 591 938                                   
email: Don.A.Carroll@bhpbilliton.com                                            
Samantha Evans, Media Relations                                                 
Tel: +61 3 9609 2898  Mobile: +61 400 693 915                                   
email: Samantha.Evans@bhpbilliton.com                                           
United Kingdom                                                                  
Andre Liebenberg, Investor Relations                                            
Tel: +44 20 7802 4131  Mobile: +44 7920 236 974                                 
email: Andre.Liebenberg@bhpbilliton.com                                         
Illtud Harri, Media Relations                                                   
Tel: +44 20 7802 4195  Mobile: +44 7920 237 246                                 
email: Illtud.Harri@bhpbilliton.com                                             
United States                                                                   
Tracey Whitehead, Investor & Media Relations                                    
Tel: US +1 713 599 6100 or UK +44 20 7802 4031                                  
Mobile: +44 7917 648 093                                                        
email: Tracey.Whitehead@bhpbilliton.com                                         
South Africa                                                                    
Alison Gilbert, Investor Relations                                              
Tel: SA +27 11 376 2121 or UK +44 20 7802 4183                                  
Mobile: +44 7769 936 227                                                        
email: Alison.Gilbert@bhpbilliton.com                                           
Not for release, publication or distribution in or into Japan                   
BHP BILLITON OFFER FOR RIO TINTO                                                
BHP Billiton Limited Offers for Rio Tinto Plc and for Rio Tinto Limited         
The Board of BHP Billiton announces an offer for Rio Tinto of 3.4 BHP           
Billiton shares for each Rio Tinto share, which, if successful, would           
create the world`s premier diversified resources company.  BHP Billiton         
believes this is compelling to shareholders of both Rio Tinto and BHP           
Billiton, unlocking significant value not available to either company on        
a stand-alone basis whilst allowing Rio Tinto shareholders to participate       
in the Enlarged Group.                                                          
Both BHP Billiton and Rio Tinto are dual listed companies (DLCs) with           
separate listed parent entities in the United Kingdom (BHP Billiton Plc         
and Rio Tinto plc) and Australia (BHP Billiton Limited and Rio Tinto            
Limited).  BHP Billiton Limited is making inter-conditional Offers for          
all of the Rio Tinto plc and Rio Tinto Limited shares.                          
On 8 November 2007 BHP Billiton announced it had approached Rio Tinto (on       
1 November 2007) to propose combining the groups through two inter-             
conditional schemes of arrangement.  Extensive consultations with the           
shareholders and stakeholders of both Rio Tinto and BHP Billiton have           
indicated a clear understanding of the industrial logic of such a               
combination and assisted BHP Billiton in determining the terms of the           
Offers being made today to the shareholders of Rio Tinto.  These terms          
represent compelling value for Rio Tinto shareholders and a substantial         
increase over the initial proposal made to the Board of Rio Tinto.  The         
Offers would give Rio Tinto shareholders:                                       
- A 45 per cent premium(1), which the Board of BHP Billiton believes is         
attractive for an equity offer in this sector;                                  
- Ongoing participation in the world`s premier diversified resources            
company;                                                                        
- Approximately 44 per cent of the Enlarged Group, compared to                  
approximately 36 per cent based on the market capitalisations prior to          
the approach by BHP Billiton to Rio Tinto(2); and                               
- A share of ongoing synergies not available to either company alone.           
Since 1 November 2007 BHP Billiton has continued to seek the support and        
recommendation of the Board of Rio Tinto.  However, to date, Rio Tinto          
has refused to enter into discussions with BHP Billiton and, as a result,       
BHP Billiton now believes it is appropriate to make an offer directly to        
Rio Tinto shareholders and is today announcing the terms of its Offers          
which represent a significant improvement to the terms of the proposal          
made to the Board of Rio Tinto in November.                                     
Commenting on the Acquisition, Don Argus, the Chairman of BHP Billiton,         
said:                                                                           
"This combination of two industry-leading companies provides a unique           
opportunity to create a truly unparalleled resources company. Whilst both       
BHP Billiton and Rio Tinto have proven strategies and excellent future          
growth prospects on a stand-alone basis, a combined entity would be able        
to unlock significant additional value for both sets of shareholders and        
be in an unparalleled position to capitalise on future opportunities.           
BHP Billiton and Rio Tinto already share many important characteristics         
such as an overriding commitment to safety, community and sustainability.       
"We are firmly of the view that the terms of the offer announced today          
are compelling and reflect our absolute conviction in the strength of           
this combination which has convinced us to make this offer directly to          
Rio Tinto`s shareholders."                                                      
Commenting on the Acquisition, Marius Kloppers, Chief Executive Officer         
of BHP Billiton, said:                                                          
"The logic of this transaction is well understood; a combination would          
provide opportunities to exploit quantified synergies and benefits worth        
US$3.7 billion per annum, which would otherwise be unavailable to both          
sets of shareholders. A combined company would also create the world`s          
premier diversified resources company with both sets of shareholders            
being offered an opportunity to be part of a truly great global growth          
story."                                                                         
BHP Billiton`s offer to acquire Rio Tinto                                       
BHP Billiton`s offer to acquire Rio Tinto provides the following:               
- Consideration of 3.4 BHP Billiton shares for each Rio Tinto share;            
- Total consideration to Rio Tinto shareholders of:                             
* US$173.6 billion, based on the closing share prices of BHP Billiton           
Limited and BHP Billiton Plc on 31 October 2007 (the last date prior to         
BHP Billiton`s approach to Rio Tinto); and                                      
* US$147.4 billion, based on the closing share prices of BHP Billiton           
Limited and BHP Billiton Plc on 4 February 2008 (the last practicable           
date prior to this Announcement).                                               
BHP Billiton has set the minimum acceptance condition such that it only         
needs to receive acceptances in respect of more than 50 per cent of the         
publicly-held shares in each of Rio Tinto plc and Rio Tinto Limited.            
Rio Tinto plc Offer                                                             
BHP Billiton`s offer for Rio Tinto plc will be structured as an offer by        
BHP Billiton Limited:                                                           
- Consideration of 3.4 BHP Billiton shares for each Rio Tinto plc Share;        
- Consideration of 80 per cent BHP Billiton Plc Shares and 20 per cent          
BHP Billiton Limited Shares, with a Mix and Match Facility; and                 
- Free Share Sale Facility in relation to New BHP Billiton Limited Shares       
for Rio Tinto plc Shareholders who hold fewer than 25,000 Rio Tinto plc         
Shares.                                                                         
This values each Rio Tinto plc Share at approximately ?63.79, giving a          
total consideration to Rio Tinto plc Shareholders of approximately ?63.6        
billion based on closing prices on 31 October 2007.                             
BHP Billiton reserves the right to implement the Rio Tinto plc Offer by         
way of a scheme of arrangement for Rio Tinto plc and to otherwise amend         
the terms of the Rio Tinto plc Offer, subject to the UK Code.                   
Rio Tinto Limited Offer                                                         
BHP Billiton`s offer for Rio Tinto Limited will be structured as an offer       
by BHP Billiton Limited:                                                        
- Consideration of 3.4 New BHP Billiton Limited Shares for each Rio Tinto       
Limited Share.                                                                  
This values each Rio Tinto Limited Share at approximately A$156.74,             
giving a total consideration to Rio Tinto Limited Shareholders of               
approximately A$44.8 billion based on closing prices on 31 October 2007.        
BHP Billiton reserves the right to implement the Rio Tinto Limited Offer        
by way of a scheme of arrangement for Rio Tinto Limited or to otherwise         
amend the terms of the Rio Tinto Limited Offer in a way which is not            
substantially less favourable to Rio Tinto Limited shareholders, subject        
to the Australian Corporations Act.                                             
Proposed share buyback                                                          
If BHP Billiton`s offer is successful(3), BHP Billiton proposes to pursue       
a capital management programme to maintain a single A rating and return         
up to US$30 billion to shareholders through a share buyback within 12           
months of completing the Acquisition.                                           
A compelling combination                                                        
BHP Billiton believes that together Rio Tinto and BHP Billiton would be         
an unparalleled strategic fit in terms of asset mix and quality, and            
culture:                                                                        
- The Enlarged Group would be without comparison in the diversified             
natural resources industry in terms of capacity to develop the projects         
required to meet the growing demand for resources;                              
- The combination reinforces BHP Billiton`s and Rio Tinto`s strategies of       
owning upstream, long-life, low-cost, expandable assets diversified by          
commodity and geography;                                                        
- The combination would create a unique organisation with a world-class         
management and operational team that will realise further benefits from         
corporate renewal and maintain strong focus on global best practice in          
safety, community and sustainability; and                                       
- The Offers preserve the advantages of the DLC structure by permitting         
shareholders to participate in the Enlarged Group in both markets.              
Unlocking value                                                                 
BHP Billiton`s and Rio Tinto`s unparalleled exposure to overlapping             
mineral basin positions is expected to unlock significant opportunities         
for value creation by:                                                          
- Optimising production efficiencies at current assets;                         
- Delivering embedded growth options within current portfolios; and             
- Accelerating future opportunities within the combined pipeline.               
These opportunities would not be available to either BHP Billiton or Rio        
Tinto on their own.                                                             
Significant quantified synergies                                                
The combination of BHP Billiton and Rio Tinto is expected to create             
substantial value through quantified synergies and benefits which are           
expected to contribute a total incremental EBITDA of US$3.7 billion             
nominal per annum within seven years of completion of the Acquisition. In       
particular, BHP Billiton expects:                                               
- US$1.7 billion nominal per annum of cost savings in the third full year       
following completion, achieved through removal of duplication as well as        
procurement and operating efficiency savings; and                               
- Further EBITDA enhancement of US$2.0 billion nominal per annum in the         
seventh full year following completion, driven primarily by the                 
acceleration of volumes to customers.                                           
An all-share offer allowing continued participation by Rio Tinto                
shareholders                                                                    
The Acquisition is structured as an all-share transaction, allowing Rio         
Tinto shareholders to participate in the Enlarged Group and gain exposure       
to the world`s premier diversified natural resources company with its           
strengthened asset portfolio and greater diversification.                       
Rio Tinto shareholders would benefit from the premium implied by the            
Offers and ownership of approximately 44 per cent of the Enlarged Group.        
It is expected that UK capital gains tax rollover relief will be                
available to UK resident shareholders accepting the Rio Tinto plc Offer         
in respect of their New BHP Billiton Plc Shares and New BHP Billiton            
Limited Shares subject to approximately 70 per cent acceptances under the       
Rio Tinto plc Offer.                                                            
If BHP Billiton Limited is able to proceed with the compulsory                  
acquisition of any remaining Rio Tinto Limited Shares, BHP Billiton             
Limited expects capital gains tax rollover relief to be available to            
Australian resident shareholders accepting the Rio Tinto Limited Offer.         
Given the size of the Rio Tinto Limited Cross-holding, to reach the             
compulsory acquisition thresholds in relation to Rio Tinto Limited:             
(A)  some or all of this holding will need to be accepted into the Rio          
Tinto Limited Offer by Rio Tinto plc; or                                        
(B)  ASIC will need to provide relief from the Australian Corporations          
Act.                                                                            
ASIC has indicated that it would consider an application for this relief        
on its merits if it becomes apparent that the Rio Tinto Limited Cross-          
holding has a clear defensive effect.                                           
Deliverable Offers                                                              
The Offers are subject to Pre-conditions relating to merger control and         
regulatory approvals in a number of jurisdictions.  Applications to the         
relevant regulatory authorities have not yet been made although                 
substantive pre-notification discussions with the European Commission are       
underway.  Contacts have also been made with a number of other regulators       
and formal notifications will follow in due course.  BHP Billiton               
believes that satisfactory clearances should be achievable.                     
Enhanced earnings, cash flow and strong capital structure                       
The Enlarged Group will deliver enhanced earnings and cash flow, allowing       
more efficient balance sheet management for the benefit of shareholders:        
- The Acquisition is expected to be accretive to BHP Billiton`s earnings        
per share (after adjusting for the proposed share buyback and excluding         
depreciation on the write-up of Rio Tinto`s assets) and cash flow per           
share (after adjusting for the proposed share buyback) from the first           
full fiscal year following completion of the Acquisition;                       
- It is BHP Billiton`s intention to maintain a single A rating for the          
Enlarged Group, with financial flexibility to return significant capital        
in the future;                                                                  
- In line with this target, and if the Offers are successful(4), BHP            
Billiton proposes to return up to US$30 billion to shareholders through a       
share buyback within 12 months of completion of the Acquisition;                
- The proposed share buyback and any refinancing of Rio Tinto`s remaining       
borrowings will be funded through a combination of a committed bank             
financing facility of US$55 billion, together with cash flow from               
operations, asset disposals and, if required, debt financing; and               
- BHP Billiton intends to maintain its current progressive dividend             
policy following completion of the Acquisition.                                 
This summary should be read in conjunction with the full text of the            
attached Announcement, including the Appendices.                                
Goldman Sachs International and Gresham Partners are acting as principal        
financial advisers to BHP Billiton in relation to the Offers.                   
BNP Paribas SA ("BNP Paribas"), Citigroup Global Markets Limited                
("Citi"), HSBC Bank plc ("HSBC"), Lazard & Co., Limited ("Lazard"),             
Merrill Lynch International and UBS (UBS Investment Bank, being UBS AG,         
Australia Branch and/or UBS Limited) are also providing financial advice        
to BHP Billiton.                                                                
Barclays Capital (the investment banking division of Barclays Bank PLC);        
BNP Paribas; Citigroup Global Markets Limited; Goldman Sachs                    
International; HSBC Bank plc; Banco Santander, S.A.; and UBS Limited are        
acting as Mandated Lead Arrangers of the US$55 billion committed bank           
financing facility.                                                             
Contacts:                                                                       
Australia                                                                       
Don Carroll, Investor Relations                                                 
Tel: +61 3 9609 2686  Mobile: +61 417 591 938                                   
email: Don.A.Carroll@bhpbilliton.com                                            
Samantha Evans, Media Relations                                                 
Tel: +61 3 9609 2898  Mobile: +61 400 693 915                                   
email: Samantha.Evans@bhpbilliton.com                                           
United Kingdom                                                                  
Andre Liebenberg, Investor Relations                                            
Tel: +44 20 7802 4131  Mobile: +44 7920 236 974                                 
email: Andre.Liebenberg@bhpbilliton.com                                         
Illtud Harri, Media Relations                                                   
Tel: +44 20 7802 4195  Mobile: +44 7920 237 246                                 
email: Illtud.Harri@bhpbilliton.com                                             
United States                                                                   
Tracey Whitehead, Investor & Media Relations                                    
Tel: US +1 713 599 6100 or UK +44 20 7802 4031                                  
Mobile: +44 7917 648 093                                                        
email: Tracey.Whitehead@bhpbilliton.com                                         
South Africa                                                                    
Alison Gilbert, Investor Relations                                              
Tel: SA +27 11 376 2121 or UK +44 20 7802 4183                                  
Mobile: +44 7769 936 227                                                        
email: Alison.Gilbert@bhpbilliton.com                                           
This Announcement is for information purposes only and does not                 
constitute an offer or invitation to acquire or dispose of any securities       
or investment advice in any jurisdiction. Any offer, invitation or              
inducement to acquire or dispose of any securities of BHP Billiton Plc,         
BHP Billiton Limited, Rio Tinto plc and/or Rio Tinto Limited will be made       
solely by means of the BHP Billiton Prospectus, the BHP Billiton Bidder`s       
Statement, the Rio Tinto plc Offer Document and associated documents            
expected to be published on satisfaction of the Pre-conditions, and any         
decision to keep, buy or sell shares in Rio Tinto plc or Rio Tinto              
Limited should be made solely on the basis of the information contained         
in such documents.  In addition, BHP Billiton shareholders are urged to         
read the BHP Billiton Prospectus and associated class 1 shareholder             
circular/explanatory statement before making any decision regarding the         
proposed transaction. The BHP Billiton Prospectus, BHP Billiton Bidder`s        
Statement, Rio Tinto plc Offer Document and related documents, once             
published, may be obtained from BHP Billiton`s website at                       
www.bhpbilliton.com or on request from BHP Billiton.                            
Information Relating to the US Offer for Rio Tinto plc                          
BHP Billiton plans to register the offer and sale of securities it would        
issue to Rio Tinto plc US shareholders and Rio Tinto plc ADR holders by         
filing with the SEC a Registration Statement (the "Registration                 
Statement"), which will contain a prospectus ("Prospectus"), as well as         
other relevant materials.  No such materials have yet been filed.  This         
communication is not a substitute for any Registration Statement or             
Prospectus that BHP Billiton may file with the SEC.                             
U.S. INVESTORS AND U.S. HOLDERS OF RIO TINTO PLC SECURITIES AND ALL             
HOLDERS OF RIO TINTO PLC ADRs ARE URGED TO READ ANY REGISTRATION                
STATEMENT, PROSPECTUS AND ANY OTHER DOCUMENTS MADE AVAILABLE TO THEM            
AND/OR FILED WITH THE SEC REGARDING THE POTENTIAL TRANSACTION, AS WELL AS       
ANY AMENDMENTS AND SUPPLEMENTS TO THOSE DOCUMENTS, WHEN THEY BECOME             
AVAILABLE BECAUSE THEY WILL CONTAIN IMPORTANT INFORMATION.                      
Investors and security holders will be able to obtain a free copy of the        
Registration Statement and the Prospectus as well as other relevant             
documents filed with the SEC at the SEC`s website (http://www.sec.gov),         
once such documents are filed with the SEC.  Copies of such documents may       
also be obtained from BHP Billiton without charge, once they are filed          
with the SEC.                                                                   
Information for US Holders of Rio Tinto Limited Shares                          
BHP Billiton Limited is not required to, and does not plan to, prepare          
and file with the SEC a registration statement in respect of the Rio            
Tinto Limited Offer.  Accordingly, Rio Tinto Limited Shareholders should        
carefully consider the following:                                               
The Rio Tinto Limited Offer will be an exchange offer made for the              
securities of a foreign company. Such offer is subject to disclosure            
requirements of a foreign country that are different from those of the          
United States. Financial statements included in the document will be            
prepared in accordance with foreign accounting standards that may not be        
comparable to the financial statements of United States companies.              
Information Relating to the US Offer for Rio Tinto plc and the Rio Tinto        
Limited Offer for Rio Tinto shareholders located in the US                      
It may be difficult for you to enforce your rights and any claim you may        
have arising under the US federal securities laws, since the issuers are        
located in a foreign country, and some or all of their officers and             
directors may be residents of foreign countries. You may not be able to         
sue a foreign company or its officers or directors in a foreign court for       
violations of the US securities laws. It may be difficult to compel a           
foreign company and its affiliates to subject themselves to a US court`s        
judgement.                                                                      
You should be aware that BHP Billiton may purchase securities of Rio            
Tinto plc and Rio Tinto Limited otherwise than under the exchange offer,        
such as in open market or privately negotiated purchases.                       
The Offers are not being made in or into, and are not capable of                
acceptance in Japan or any other jurisdiction where to do so would              
constitute a violation of the laws of such jurisdiction, or by the use of       
the mails or by any means or instrumentality (including without                 
limitation, facsimile transmission, telephone and/or the internet) of           
interstate or foreign commerce, or any facility of a national securities        
exchange, of such jurisdiction.                                                 
The Rio Tinto Limited Offer will not necessarily be registered in any           
jurisdiction outside Australia (unless an applicable foreign law treats         
it as registered as a result of the BHP Billiton Bidder`s statement being       
lodged with ASIC).  Any Rio Tinto Limited Shareholder who wishes to             
accept the Rio Tinto Limited Offer must first satisfy itself that such          
acceptance is permitted by any foreign law applicable to that                   
shareholder.  If any authority or clearance under Australian law is             
required to enable a shareholder in Rio Tinto Limited to receive any            
consideration under the Rio Tinto Limited Offer, any acceptance of the          
Rio Tinto Limited Offer will not create any right to receive that               
consideration unless and until all requisite authorities or clearances          
have been received.                                                             
Goldman Sachs International, which is authorised and regulated in the           
United Kingdom by the Financial Services Authority, is acting exclusively       
for BHP Billiton as principal financial adviser and corporate broker in         
relation to the matters described in this Announcement and is not               
advising any other person and accordingly will not be responsible to any        
person other than BHP Billiton for providing the protections afforded to        
the customers of Goldman Sachs International or for providing advice in         
relation to matters described in this Announcement.                             
Gresham Partners, which holds an Australian Financial Services Licence          
under the Australian Corporations Act, is acting exclusively for BHP            
Billiton as principal financial adviser in relation to the matters              
described in this Announcement and will not be responsible to anyone            
other than BHP Billiton for providing the protections afforded to the           
clients of Gresham Partners nor for providing advice in relation to             
matters described in this Announcement.                                         
BNP Paribas, which is authorised and regulated in the United Kingdom by         
the Financial Services Authority, is providing financial advice to BHP          
Billiton in relation to the matters described in this Announcement and is       
not advising any other person and accordingly will not be responsible to        
any person other than BHP Billiton for providing the protections afforded       
to the customers of BNP Paribas or for providing advice in relation to          
matters described in this Announcement.                                         
Citi, which is authorised and regulated in the United Kingdom by the            
Financial Services Authority, is providing financial advice and acting as       
corporate broker to BHP Billiton in relation to the matters described in        
this Announcement and is not advising any other person and accordingly          
will not be responsible to any person other than BHP Billiton for               
providing the protections afforded to the customers of Citi or for              
providing advice in relation to matters described in this Announcement.         
HSBC, which is authorised and regulated in the United Kingdom by the            
Financial Services Authority, is providing financial advice to BHP              
Billiton in relation to the matters described in this Announcement and is       
not advising any other person and accordingly will not be responsible to        
any person other than BHP Billiton for providing the protections afforded       
to the customers of HSBC or for providing advice in relation to matters         
described in this Announcement.                                                 
Lazard, which is authorised and regulated in the United Kingdom by the          
Financial Services Authority, is providing financial advice to BHP              
Billiton in relation to the matters described in this Announcement and is       
not advising any other person and accordingly will not be responsible to        
any person other than BHP Billiton for providing the protections afforded       
to the customers of Lazard or for providing advice in relation to matters       
described in this Announcement.                                                 
Merrill Lynch International, which is authorised and regulated in the           
United Kingdom by the Financial Services Authority, is providing                
financial advice and acting as corporate broker to BHP Billiton in              
relation to the matters described in this Announcement and is not               
advising any other person and accordingly will not be responsible to any        
person other than BHP Billiton for providing the protections afforded to        
the customers of Merrill Lynch International or for providing advice in         
relation to matters described in this Announcement.                             
UBS Investment Bank is providing financial advice to BHP Billiton in            
relation to the matters described in this Announcement and is not               
advising any other person and accordingly will not be responsible to any        
person other than BHP Billiton for providing the protections afforded to        
the clients of UBS or for providing advice in relation to matters               
described in this Announcement.                                                 
The banks participating in the committed bank financing facility of US$55       
billion are as follows:                                                         
As Mandated Lead Arranger: Barclays Capital (the investment banking             
division of Barclays Bank PLC); BNP Paribas; Citigroup Global Markets           
Limited; Goldman Sachs International; HSBC Bank plc; Banco Santander,           
S.A.; and UBS Limited.                                                          
As Underwriter: Barclays Bank PLC; BNP Paribas; Citibank N.A., London           
Branch; Goldman Sachs Credit Partners L.P.; HSBC Bank plc; Banco                
Santander, S.A.; and UBS AG, London Branch.                                     
It is possible that this Announcement could or may contain forward-             
looking statements that are based on current expectations or beliefs, as        
well as assumptions about future events.  Reliance should not be placed         
on any such statements because of their very nature, they are subject to        
known and unknown risks and uncertainties and can be affected by other          
factors that could cause actual results, and BHP Billiton`s plans and           
objectives, to differ materially from those expressed or implied in the         
forward-looking statements.                                                     
None of the statements concerning expected cost savings and volume-driven       
benefits (and resulting incremental EBITDA) and earnings per share              
accretion in this Announcement should be interpreted to mean that the           
future earnings per share of the Enlarged Group for current or future           
financial years will necessarily match or exceed the historical or              
published earnings per share of BHP Billiton, and the actual cost savings       
and volume-driven benefits (and resulting EBITDA enhancement) may be            
materially greater or less than estimated.                                      
There are several factors which could cause actual results to differ            
materially from those expressed or implied in forward-looking statements.       
Among the factors that could cause actual results to differ materially          
from those described in the forward-looking statements are BHP Billiton`s       
ability to successfully combine the businesses of BHP Billiton and Rio          
Tinto and to realise expected synergies from that combination, changes in       
the global, political, economic, business, competitive, market and              
regulatory forces, future exchange and interest rates, changes in tax           
rates and future business combinations or dispositions.                         
BHP Billiton does not undertake any obligation (except as required by           
law, the Listing Rules of ASX Limited or the rules of the UK Listing            
Authority and the London Stock Exchange) to revise or update any forward-       
looking statement contained in this Announcement, regardless of whether         
those statements are affected as a result of new information, future            
events or otherwise.                                                            
Under the provisions of Rule 8.3 of the Takeover Code (the "Code"), if          
any person is, or becomes, "interested" (directly or indirectly) in one         
per cent or more of any class of "relevant securities" of any of BHP            
Billiton Plc, BHP Billiton Limited, Rio Tinto plc or Rio Tinto Limited,         
all "dealings" in any "relevant securities" of that company (including by       
means of an option in respect of, or a derivative referenced to, any such       
"relevant securities") must be publicly disclosed by no later than 3.30         
pm (London time) on the London business day following the date of the           
relevant transaction.                                                           
The relevant disclosure must include details of all "interests" or              
"dealings" in any class of "relevant securities" of the other company           
which is part of its DLC structure.  Therefore, if, for example, a              
disclosure is being made in respect of a dealing in securities of BHP           
Billiton Plc, an accompanying disclosure must also be made of interests         
or short positions held in securities of BHP Billiton Limited, even if          
the person`s interest or short position is less than one per cent of the        
relevant class.  The same approach should be adopted in respect of              
securities of Rio Tinto plc and Rio Tinto Limited.  Therefore, each             
disclosure should consist of two Rule 8.3 disclosure forms, one for the         
Plc arm of the DLC structure and one for the Limited arm of the DLC             
structure, released as one announcement.                                        
This requirement will continue until the date on which the Offers become,       
or are declared, unconditional as to acceptances, lapse or are otherwise        
withdrawn or on which the "offer period" otherwise ends. If two or more         
persons act together pursuant to an agreement or understanding, whether         
formal or informal, to acquire an "interest" in "relevant securities" of        
BHP Billiton Plc, BHP Billiton Limited, Rio Tinto plc or Rio Tinto              
Limited, they will be deemed to be a single person for the purpose of           
Rule 8.3.                                                                       
Under the provisions of Rule 8.1 of the Code, all "dealings" in "relevant       
securities" of either BHP Billiton or Rio Tinto by BHP Billiton or Rio          
Tinto, or by any of their respective "associates", must be disclosed by         
no later than 12.00 noon (London time) on the London business day               
following the date of the relevant transaction.                                 
A disclosure table, giving details of the companies in whose "relevant          
securities" "dealings" should be disclosed, and the number of such              
securities in issue, can be found on the UK Panel`s website at                  
www.thetakeoverpanel.org.uk.                                                    
"Interests in securities" arise, in summary, when a person has long             
economic exposure, whether conditional or absolute, to changes in the           
price of securities. In particular, a person will be treated as having an       
"interest" by virtue of the ownership or control of securities, or by           
virtue of any option in respect of, or derivative referenced to,                
securities.                                                                     
Terms in quotation marks are defined in the Code, which can also be found       
on the UK Panel`s website. If you are in any doubt as to whether or not         
you are required to disclose a "dealing" under Rule 8, you should consult       
the UK Panel.                                                                   
6 February 2008                                                                 
Not for release, publication or distribution in or into Japan                   
BHP BILLITON OFFER FOR RIO TINTO                                                
BHP Billiton Limited Offers for Rio Tinto Plc and for Rio Tinto Limited         
1. Introduction                                                                 
The Board of BHP Billiton believes that it is compelling and logical to         
combine BHP Billiton and Rio Tinto and that the combination will deliver        
substantial benefits to both BHP Billiton and Rio Tinto shareholders.  In       
particular, the Board believes that its Offers to acquire Rio Tinto would       
deliver significantly greater benefits to the shareholders of Rio Tinto         
than Rio Tinto could otherwise achieve on its own and, due to the all-          
share nature of the Offers, allow Rio Tinto shareholders to participate         
in the underlying assets of both groups.  Following completion of the           
Acquisition, Rio Tinto shareholders would own approximately 44 per cent         
of the Enlarged Group compared to the approximately 36 per cent level           
represented by the market capitalisations of the companies prior to the         
approach by BHP Billiton to Rio Tinto and would therefore also receive          
approximately 44 per cent of all future synergies (assuming full                
acceptance of the Offers on a fully diluted basis).                             
Since BHP Billiton`s announcement on 8 November 2007 that it had made a         
proposal to Rio Tinto on 1 November 2007 to combine the two groups, BHP         
Billiton has undertaken extensive consultations with the shareholders and       
stakeholders of both Rio Tinto and BHP Billiton which have indicated a          
clear understanding of the industrial logic of such a combination and           
assisted BHP Billiton in determining the terms of the Offers being made         
today to the shareholders of Rio Tinto.  These terms represent compelling       
value for Rio Tinto shareholders and a substantial increase over the            
initial proposal made to the Board of Rio Tinto.                                
Accordingly the Board of BHP Billiton is announcing today the terms of          
two inter-conditional Offers by BHP Billiton Limited for Rio Tinto plc          
and Rio Tinto Limited.  This Announcement relates to both the Rio Tinto         
plc Offer and the Rio Tinto Limited Offer.                                      
2. The Rio Tinto plc Offer                                                      
The Rio Tinto plc Offer will be structured as an offer by BHP Billiton          
Limited for Rio Tinto plc:                                                      
- 3.4 BHP Billiton shares for each Rio Tinto plc Share;                         
- Basic entitlement to 80 per cent BHP Billiton Plc Shares and 20 per           
cent BHP Billiton Limited Shares;                                               
- Mix and Match Facility; and                                                   
- Free Share Sale Facility for New BHP Billiton Limited Shares for Rio          
Tinto plc Shareholders who hold fewer than 25,000 Rio Tinto plc Shares.         
The Mix and Match Facility would allow Rio Tinto plc Shareholders to            
elect to receive a higher proportion of New BHP Billiton Plc Shares or          
New BHP Billiton Limited Shares than the basic entitlement affords.             
However, the total number of New BHP Billiton Plc Shares and New BHP            
Billiton Limited Shares to be issued to Rio Tinto plc Shareholders in           
aggregate under the Rio Tinto plc Offer will not be varied as a result of       
elections made under the Mix and Match Facility.                                
Accordingly, BHP Billiton Limited`s ability to satisfy elections made by        
Rio Tinto plc Shareholders under the Mix and Match Facility will depend         
upon other Rio Tinto plc Shareholders making offsetting elections.  To          
the extent that elections for New BHP Billiton Plc Shares or New BHP            
Billiton Limited Shares cannot be satisfied in full, they will be scaled        
back on a pro rata basis.                                                       
As a result, any Rio Tinto plc Shareholder who makes a valid election to        
receive more than his/her basic entitlement to either New BHP Billiton          
Limited Shares or New BHP Billiton Plc Shares will not know the exact           
proportion of New BHP Billiton Limited Shares and New BHP Billiton Plc          
Shares he/she will receive until settlement of his/her consideration            
under the Rio Tinto plc Offer.                                                  
Any Rio Tinto plc Shareholder who does not make an election under the Mix       
and Match Facility will receive 80 per cent New BHP Billiton Plc Shares         
and 20 per cent New BHP Billiton Limited Shares in accordance with the          
basic terms of the Rio Tinto plc Offer.                                         
Further details of the Mix and Match Facility will be included in the Rio       
Tinto plc Offer Document to be published in connection with the Rio Tinto       
plc Offer.                                                                      
A brief description of the Share Sale Facility is given in paragraph 15         
below.                                                                          
Rio Tinto plc Shareholders will obtain their entitlement to New BHP             
Billiton Plc Shares through an automatic exchange mechanism whereby they        
will initially be issued with the appropriate number of Interim Shares          
which will immediately be exchanged for New BHP Billiton Plc Shares.            
BHP Billiton reserves the right to implement the Rio Tinto plc Offer by         
way of a scheme of arrangement for Rio Tinto plc or to otherwise amend          
the terms of the Rio Tinto plc Offer, subject to the UK Code.                   
3. US shareholders of Rio Tinto plc                                             
The Rio Tinto plc Offer is to be made to holders of Rio Tinto plc Shares        
who are located in the US and to all holders of Rio Tinto plc ADRs,             
wherever located (not solely US holders of ADRs) by means of the US             
Offer, which forms part of the Rio Tinto plc Offer.  The treatment of           
holders of Rio Tinto plc ADRs will generally be comparable to the               
treatment of holders of Rio Tinto plc Shares discussed in this                  
Announcement, except that the consideration such Rio Tinto ADR holders          
receive will ultimately be in the form of new BHP Billiton Limited ADRs         
and new BHP Billiton Plc ADRs.  The terms of the US Offer will be set           
forth in a Registration Statement on Form F-4 which BHP Billiton plans to       
file with the SEC and which will need to be declared effective by the SEC       
prior to the issuance of any securities pursuant to the US Offer.               
Acceptances under the US Offer will count towards any required thresholds       
under the Rio Tinto plc Offer.                                                  
4. The Rio Tinto Limited Offer                                                  
The Rio Tinto Limited Offer will be structured as an offer by BHP               
Billiton Limited for Rio Tinto Limited.  Under the terms of the Rio Tinto       
Limited Offer, BHP Billiton will offer Rio Tinto Limited Shareholders 3.4       
New BHP Billiton Limited Shares for each Rio Tinto Limited Share.               
BHP Billiton reserves the right to implement the Rio Tinto Limited Offer        
by way of a scheme of arrangement for Rio Tinto Limited or to otherwise         
amend the terms of the Rio Tinto Limited Offer in a way which is not            
substantially less favourable to Rio Tinto Limited Shareholders, subject        
to the Australian Corporations Act.                                             
5. Value of the Offers                                                          
BHP Billiton`s offer to acquire Rio Tinto                                       
On the basis of the closing prices of a BHP Billiton Limited Share of           
A$46.10 and a BHP Billiton Plc Share of ?18.31 on 31 October 2007 (being        
the date immediately prior to BHP Billiton`s approach to Rio Tinto), the        
Offers represent:                                                               
- Total consideration of US$173.6 billion to Rio Tinto shareholders; and        
- A premium of 42 per cent to the combined market capitalisations of Rio        
Tinto Limited and Rio Tinto plc on 31 October 2007 of US$122.1 billion.         
Based on the volume weighted average prices of BHP Billiton Limited and         
BHP Billiton Plc Shares for the month ended 31 October 2007, the Offers         
represent:                                                                      
- Total consideration of US$171.3 billion to Rio Tinto shareholders; and        
- A premium of 45 per cent to the combined volume weighted average market       
capitalisations of Rio Tinto Limited and Rio Tinto plc over the same            
period.                                                                         
Based on BHP Billiton`s closing share prices on 4 February 2008 (being          
the last practicable date prior to this Announcement), the total                
consideration offered to shareholders of Rio Tinto Limited and Rio Tinto        
plc is US$147.4 billion, which represents a premium of approximately 21         
per cent to the combined market capitalisations of Rio Tinto Limited and        
Rio Tinto plc on 8 November 2007 and 7 November 2007, respectively, being       
market capitalisations reflecting closing prices of Rio Tinto Limited and       
Rio Tinto plc shares immediately prior to BHP Billiton`s announcement on        
8 November 2007.                                                                
Following completion of the Acquisition, Rio Tinto shareholders would own       
approximately 44 per cent of the combined issued ordinary share capital         
of BHP Billiton Limited and BHP Billiton Plc (assuming full acceptance of       
the Offers on a fully diluted basis and excluding any intra-DLC cross-          
holdings).  This level of pro forma ownership would represent an increase       
to Rio Tinto`s contribution to the combined market capitalisation from          
approximately 36 per cent based on the closing share prices on 31 October       
2007 (the date immediately prior to the approach by BHP Billiton to Rio         
Tinto).                                                                         
Rio Tinto plc Offer                                                             
On the basis of the closing prices of a BHP Billiton Limited Share of           
A$46.10 and a BHP Billiton Plc Share of ?18.31 on 31 October 2007 (being        
the last practicable date prior BHP Billiton`s approach to Rio Tinto),          
the Rio Tinto plc Offer values:                                                 
- Each Rio Tinto plc Share at approximately ?63.79; and                         
- The issued ordinary share capital of Rio Tinto plc at approximately           
?63.6 billion.                                                                  
On the basis of the closing prices of a BHP Billiton Limited Share of           
A$39.32 and a BHP Billiton Plc Share of ?16.49 on 4 February 2008 (being        
the last practicable date prior to this Announcement), the Rio Tinto plc        
Offer values:                                                                   
- Each Rio Tinto plc Share at approximately ?57.16; and                         
- The issued ordinary share capital of Rio Tinto plc at approximately           
?57.0 billion.                                                                  
Rio Tinto Limited Offer                                                         
On the basis of the closing price of a BHP Billiton Limited Share of            
A$46.10 on 31 October 2007 (being the last date prior to BHP Billiton`s         
approach to Rio Tinto), the Rio Tinto Limited Offer values each Rio Tinto       
Limited Share at A$156.74 and the issued ordinary share capital of Rio          
Tinto Limited at A$44.8 billion.                                                
On the basis of the closing price of a BHP Billiton Limited Share of            
A$39.32 on 4 February 2008 (being the last practicable date prior to this       
Announcement), the Rio Tinto Limited Offer values each Rio Tinto Limited        
Share at approximately A$133.69 and the issued ordinary share capital of        
Rio Tinto Limited at approximately A$38.2 billion.                              
6. Fractional entitlements                                                      
No fractions of New BHP Billiton Limited Shares or Interim Shares will be       
issued to holders of Rio Tinto plc Shares or Rio Tinto Limited Shares.          
Any fractional entitlements will be rounded up or down to the nearest           
whole number (with fractional entitlements to 0.5 of a New BHP Billiton         
Limited Share or of an Interim Share being rounded up).                         
7. Effect of Acquisition on the share capital of BHP Billiton Plc and BHP       
Billiton Limited                                                                
The Acquisition would result in the issue of approximately:                     
- 2,265,767,683 New BHP Billiton Limited Shares, representing                   
approximately 40 per cent of the issued ordinary share capital of BHP           
Billiton Limited following completion of the Acquisition (assuming full         
acceptance of the Offers on a fully diluted basis including the Rio Tinto       
Limited Cross-holding); and                                                     
- 2,739,049,449 New BHP Billiton Plc Shares, representing approximately         
55 per cent of the issued ordinary share capital of BHP Billiton Plc            
following completion of the Acquisition (assuming full acceptance of the        
Rio Tinto plc Offer on a fully diluted basis).                                  
Following the Acquisition, on the same basis, the combined issued               
ordinary share capital of BHP Billiton Limited and BHP Billiton Plc will        
have increased approximately 90 per cent from the position as it is             
today. Rio Tinto shareholders will hold approximately 44 per cent of this       
enlarged publicly-held share capital (assuming full acceptance of the           
Offers on a fully diluted basis).                                               
8. Background to and reasons for the Acquisition                                
The Board of BHP Billiton believes that the fit between the two companies       
in terms of values, strategy, asset mix and quality, as well as culture         
is without comparison in the diversified natural resources industry. Each       
company has a portfolio of large-scale, low-cost, long-life assets that         
are highly complementary and, when combined, would represent the leading        
portfolio of high quality assets in the industry.                               
* Unlocking value                                                               
Significant opportunities to release value through complementary and            
overlapping assets                                                              
BHP Billiton believes the combined portfolio would deliver benefits that        
are only achievable through a combination of BHP Billiton and Rio Tinto         
as a result of the common and overlapping presence in a number of major         
resource basins and joint ownership interests.  This relatively high            
degree of overlap is unique in the industry and is expected to provide          
opportunities for significant value creation through economies of scale,        
sharing of infrastructure and removal of duplication.  Examples include:        
- Faster and more efficient development of the combined iron ore                
resources in Western Australia;                                                 
- Optimisation of thermal coal operations in the Hunter Valley,                 
Australia;                                                                      
- More efficient development of metallurgical coal operations in the            
Bowen Basin, Australia; and                                                     
- Improved development of brownfield and greenfield opportunities in            
industrial minerals in Southern Africa.                                         
Greater opportunities to meet the challenges of growing demand                  
BHP Billiton believes by combining the two development portfolios and           
more effectively utilising resources and infrastructure, the Enlarged           
Group will be able to deliver an improved supply-side response to meet          
the growing demand from customers by providing greater volumes on an            
accelerated basis.  It will also be supported through greater abilities         
to develop new production and optimise supply logistics through blending        
and better delivery options.                                                    
Enhanced delivery of future growth options                                      
Rio Tinto and BHP Billiton are both seeking to develop new resources in         
geographies that frequently have high infrastructure needs and other            
associated costs, as well as increased risks. Through Rio Tinto and BHP         
Billiton`s extensive experience and resources, the Enlarged Group would         
have a greater ability to develop efficiently the next generation of            
large-scale projects in these new regions for the benefit of its                
customers, the communities in which it operates, and its shareholders.          
Management team with enhanced strength and depth                                
The Enlarged Group would have a world-class management and operational          
team with significant strength and depth across all levels of the               
organisation. BHP Billiton and Rio Tinto are both committed to the              
pursuit of excellence and the highest standards in safety and                   
sustainability with a focus on global best practice in community and            
environment.  The Enlarged Group will continue this commitment.                 
As a result of this alignment the Board of BHP Billiton is confident of         
being able to integrate the two organisations smoothly and efficiently          
following the Acquisition.  Key management positions would be filled by         
drawing on the best of both management teams and the development of the         
best people from both companies would be considered an important driver         
of the ongoing success of the combination.                                      
* Substantial quantified synergies                                              
The combination of BHP Billiton and Rio Tinto is expected to create             
substantial value through both cost savings and volume-driven benefits          
that would arise as result of the Acquisition.  These synergies, due to         
the substantial overlap in neighbouring and jointly-owned operations, are       
only available through the combination of BHP Billiton and Rio Tinto. In        
particular, BHP Billiton expects:                                               
- US$1.7 billion nominal per annum of cost savings in the third full year       
following completion, achieved through removal of duplication as well as        
procurement and operating efficiency savings; and                               
- Further EBITDA enhancement of US$2.0 billion nominal per annum in the         
seventh full year following completion, driven primarily by the                 
acceleration of volumes to customers.                                           
In the seventh full year following completion this, therefore, is               
expected to result in a total incremental EBITDA of US$3.7 billion              
nominal per annum of quantified synergies.                                      
The total one-off implementation cash costs related to achieving these          
synergies are expected to amount to US$0.65 billion over the first two          
years following completion.                                                     
This estimate of synergies has been reported on under the UK Code by KPMG       
and by BHP Billiton`s financial adviser Goldman Sachs International.            
Copies of their letters are included in parts (a) and (b) respectively of       
Appendix V.                                                                     
The estimate of synergies should be read in conjunction with notes (s) to       
(w) of Appendix IV.                                                             
The Board of BHP Billiton also expects that the Acquisition would be            
accretive to BHP Billiton`s earnings per share (after adjusting for the         
proposed share buyback and excluding depreciation on the write-up of Rio        
Tinto`s assets) and cashflow per share (after adjusting for the proposed        
share buyback) from the first full fiscal year following completion of          
the Acquisition.                                                                
* All-share Offers that allow continued participation by Rio Tinto              
shareholders                                                                    
The Acquisition is structured as an all-share transaction implemented           
through two inter-conditional Offers.  As a result Rio Tinto shareholders       
will be able to participate in the Enlarged Group and gain exposure to          
the world`s premier diversified natural resources company with its              
strengthened asset portfolio and greater diversification.  Rio Tinto            
shareholders will benefit from the premium implied by the Offers and the        
pro rata access to the economic benefits of the combination through their       
ownership of approximately 44 per cent of the Enlarged Group (assuming          
full acceptance of the Offers on a fully diluted basis).                        
* Deliverable Offers - Manageable anti-trust issues not expected to have        
a material impact                                                               
BHP Billiton has undertaken extensive in-depth analysis on the potential        
impact of the Acquisition on the markets in which BHP Billiton and Rio          
Tinto participate.  BHP Billiton believes that this analysis shows that         
the potential anti-trust issues are manageable and should not impact in         
any material way either the future prospects of the Enlarged Group or the       
amount and achievability of synergies.                                          
In fact, BHP Billiton believes that the cost savings, expanded growth           
options and speed-to-market benefits available to the Enlarged Group            
would provide material pro-competitive benefits in key commodity markets        
to the benefit of BHP Billiton`s and Rio Tinto`s customers.  As a result,       
BHP Billiton is confident that it will be able to obtain satisfactory           
regulatory clearances from the various regulatory bodies.                       
BHP Billiton has been progressing substantive pre-notification                  
discussions with the European Commission with respect to the EU merger          
control process and expects to notify the transaction formally to the           
European Commission in the first quarter of 2008.  Preliminary contact          
has also been made with the relevant regulatory authorities in Australia,       
the US, Canada and South Africa and formal notifications will be filed in       
those jurisdictions in due course.  BHP Billiton expects to receive the         
necessary clearances during the second half of 2008.                            
* Preservation of the DLC structure allowing access for shareholders to         
both markets                                                                    
The DLC structure has historically served BHP Billiton and Rio Tinto            
well, allowing shareholders to participate in both the Australian and UK        
markets with equivalent economic ownership of the underlying assets. BHP        
Billiton is proposing to maintain this structure to allow shareholders to       
participate in the Enlarged Group in either market, providing equivalent        
economic ownership regardless of the market in which a shareholder              
invests.                                                                        
* Enhanced cash flow and a strong capital structure                             
The Board of BHP Billiton believes that the strength and diversification        
of the asset portfolio of the Enlarged Group will enable it to deliver          
strong long-term performance through the commodity cycle.  As a result,         
BHP Billiton`s intention is to maintain a single A rating for the               
Enlarged Group. Combined with its strong cash flow this target is               
expected to provide financial flexibility to return significant capital         
to shareholders in the future while maintaining flexibility for future          
investment and maintaining BHP Billiton`s current progressive dividend          
policy.                                                                         
In line with this target, and if the Offers are successful(5), BHP              
Billiton proposes to return up to US$30 billion to shareholders through a       
share buyback within 12 months of completion of the Acquisition. The            
proposed share buyback and any refinancing that might arise as a result         
of the Acquisition, including of Rio Tinto`s remaining borrowings, will         
be funded through a combination of sources comprising a committed bank          
financing facility of US$55 billion, together with cash flow from               
operations, asset disposal proceeds from the continued optimisation of          
BHP Billiton`s asset portfolio and if required debt financing.                  
9. Dividends                                                                    
BHP Billiton intends to maintain its current progressive dividend policy        
which seeks steadily to increase or at least to maintain the dividend in        
US dollars at each half yearly payment provided that BHP Billiton               
generates sufficient profit and cash flow to do so.                             
BHP Billiton Limited will continue to pay dividends in Australian               
dollars, British pounds, New Zealand dollars or United States dollars,          
depending on the country of residence of the shareholder. BHP Billiton          
Plc will continue to pay dividends in British pounds to shareholders on         
its principal register in the UK and South African rand to shareholders         
on its branch register in South Africa.                                         
10. Information on BHP Billiton                                                 
BHP Billiton is headquartered in Melbourne, Australia, and is the world`s       
largest global diversified natural resources company. BHP Billiton is           
listed on stock exchanges in Australia (ASX), the United Kingdom (LSE),         
the United States (NYSE), South Africa (JSE), Germany (Frankfurt) and           
Switzerland (Zurich).  As at 4 February 2008, BHP Billiton had a market         
capitalisation of US$192.0 billion.                                             
BHP Billiton has approximately 39,000 employees working in more than 100        
operations in approximately 25 countries. For the financial year ended 30       
June 2007, BHP Billiton reported revenue of US$47.5 billion, Underlying         
EBIT of US$20.1 billion, net profit attributable to shareholders of             
US$13.4 billion and net operating cash flow of US$15.6 billion. As at 30        
June 2007, BHP Billiton had net assets of US$29.9 billion.                      
On 6 February, BHP Billiton released interim results for the half year          
ended 31 December, 2007. Key highlights were revenue of US$25.5 billion,        
Underlying EBIT of US$9.6 billion, net profit attributable to                   
shareholders of US$6.0 billion and net operating cash flow of US$7.9            
billion.                                                                        
BHP Billiton operates ten business units or Customer Sector Groups              
(CSGs), aligned with the commodities which the company extracts and             
markets. The ten CSGs are Aluminium, Base Metals, Uranium, Diamonds and         
Specialty Products, Energy Coal, Iron Ore, Manganese, Metallurgical Coal,       
Petroleum and Stainless Steel Materials.                                        
* The Aluminium CSG`s (12 per cent of total BHP Billiton FY2007 revenue)        
principal activities are the mining of bauxite, refining of bauxite into        
alumina and smelting of alumina into aluminium metal. The CSG has               
operations in Australia, Brazil, Mozambique, South Africa, and Suriname.        
* The Base Metals CSG`s (27 per cent of total BHP Billiton FY2007               
revenue) principal activities are the mining of copper, silver, lead,           
zinc, molybdenum, uranium (prior to July 2007) and gold. The Base Metals        
CSG has operations in Australia, Chile, Peru and the US.                        
* A separate Uranium CSG was created in July 2007. Its principal                
activities are the production and marketing of uranium and the operation        
and development of the Olympic Dam ore body. The Uranium CSG`s results          
are reported as part of the consolidated Base Metals CSG`s results.             
* The Diamonds and Specialty Products CSG`s (two per cent of total BHP          
Billiton FY2007 revenue) principal activities are the mining of diamonds        
and titanium minerals. The CSG has operations in Canada and South Africa.       
* The Energy Coal CSG`s (10 per cent of total BHP Billiton FY2007               
revenue) principal activities are the mining and marketing of export            
thermal (energy) coal. The CSG has operations in Australia, Colombia,           
South Africa and the United States.                                             
* The Iron Ore CSG`s (12 per cent of total BHP Billiton FY2007 revenue)         
principal activities are the mining of iron ore from a number of mines.         
The CSG`s principal operations are based in the Pilbara region of north         
Western Australia and in Brazil.                                                
* The Manganese CSG`s (three per cent of total BHP Billiton FY2007              
revenue) principal activities are the mining of manganese ore and               
production of manganese metal and alloys. The CSG has operations in             
Australia and South Africa.                                                     
* The Metallurgical Coal CSG`s (eight per cent of total BHP Billiton            
FY2007 revenue) principal activities are the mining of metallurgical coal       
in Australia.                                                                   
* The Petroleum CSG`s (12 per cent of total BHP Billiton FY2007 revenue)        
principal activities are oil and gas exploration, production, development       
and marketing in Australia, the United Kingdom, the United States,              
Algeria, Trinidad and Tobago, and Pakistan.                                     
* The Stainless Steel Materials CSG`s (15 per cent of total BHP Billiton        
FY2007 revenue) principal activities are producing nickel concentrate           
primarily for the stainless steel industry. The CSG operates a number of        
mines, concentrators, smelters and refineries in Australia and Colombia.        
11. Current trading and prospects for the BHP Billiton Group                    
On 6 February, BHP Billiton released interim results for the half year          
ended 31 December, 2007. The results presented represent an excellent           
operating and financial performance. These results are based on a strong        
production performance across the breadth of BHP Billiton`s business,           
outstanding cost control in the face of significant cost pressures and          
additional volumes from newly commissioned growth projects. BHP                 
Billiton`s performance has not only benefited from the unique                   
diversification across petroleum, bulk and non ferrous commodities, but         
also the diversification within each of these broad categories.  In             
particular, record half year earnings results in iron ore and manganese         
demonstrated that BHP Billiton was able to capture strong market                
conditions in the steel-making sector. Record half year earnings from           
petroleum in an environment of strong prices were the result of excellent       
management of natural field decline and volume growth from new projects.        
BHP Billiton`s Underlying EBIT of US$9.6 billion is an increase of 5.4          
per cent over the corresponding period last year (being the 6 months to         
31 December 2006). Underlying EBIT margin was 44.4 per cent. Earnings per       
share, excluding exceptional items, were up 2.8 per cent at 106.8 US            
cents reflecting the benefit of the share buy-back program. This result         
has been achieved in an environment in which input prices have increased        
significantly and currencies have appreciated strongly. The reduction in        
Underlying EBIT, as a result of the weaker US dollar, was US$506 million        
more than the corresponding period.                                             
In pursuit of BHP Billiton`s strategy, BHP Billiton continues to focus on       
the fundamental drivers of value creation for shareholders: by operating        
large, long-life, low cost expandable assets while taking a disciplined         
and value-focused approach to pursuing additional organic and non-organic       
growth options.                                                                 
BHP Billiton achieved record or equal record production(6) for seven            
major commodities and significantly increased production across a further       
six commodities. Production records were achieved by 12 assets in six of        
BHP Billiton`s Customer Sector Groups. This performance reinforces BHP          
Billiton`s track record of consistent growth on the back of predictable         
project delivery coming from a deep inventory of projects that will             
continue to underpin BHP Billiton`s growth plans. This increased                
production from high returning assets has allowed BHP Billiton to capture       
the benefits of strong first half conditions in key commodity markets.          
First production was successfully achieved at seven major projects:             
Genghis Khan, Atlantis South and Stybarrow (oil and gas), Koala                 
Underground (diamonds), Pinto Valley (copper in concentrate), Rapid             
Growth Project 3 (iron ore) and Ravensthorpe (contained nickel in               
concentrate). BHP Billiton expects to deliver significant volume growth         
in the second half of FY 2008 with continued ramp up of these projects,         
and the expected commissioning of an additional four projects.                  
During the period BHP Billiton approved three new projects; the Kipper          
project (gas), Klipspruit (energy coal), the Gemco expansion project            
(manganese concentrate) and in January 2008, BHP Billiton approved the          
Newcastle Third Port Project (energy coal export capacity). All of these        
projects will support continued growth across a number of BHP Billiton`s        
businesses in future years.                                                     
12. Information on Rio Tinto                                                    
Rio Tinto is headquartered in London, United Kingdom and is listed on the       
Australian, London and New York stock exchanges. As at 4 February, 2008,        
Rio Tinto had a market capitalisation of US$142.2 billion.                      
Rio Tinto has operations worldwide with strong representation in                
Australia and North America and significant businesses in South America,        
Asia, Europe and Southern Africa. Through its global operations, Rio            
Tinto produces iron ore, metallurgical and thermal coal, copper, bauxite,       
alumina, aluminium, uranium and diamonds as well as other base metals and       
industrial minerals.                                                            
Rio Tinto has recently expanded its aluminium operations with the               
acquisition of Alcan, creating the world`s leading supplier of aluminium.       
Rio Tinto has separately indicated that it intends to dispose of several        
assets including its packaging business, engineered products business and       
various resource assets.                                                        
13. Management and employees                                                    
Shortage of labour is an ongoing issue in the global resources sector.          
The combination of BHP Billiton and Rio Tinto will allow the Enlarged           
Group to deploy this scarce resource more effectively, removing overlap         
and freeing people to focus on the highest value opportunities.                 
BHP Billiton attaches great importance to the skills and experience of          
the existing management and employees of Rio Tinto and believes that they       
will benefit significantly from the greater opportunities that the              
Enlarged Group can provide for them. The existing employment rights of          
all management and employees of Rio Tinto will be fully safeguarded.            
14. Rio Tinto Share Schemes                                                     
The Rio Tinto plc Offer will extend to any Rio Tinto plc Shares                 
unconditionally allotted or issued fully paid (or credited as fully paid)       
upon exercise of options granted under the Rio Tinto plc Share Schemes          
whilst the Rio Tinto plc Offer remains open for acceptance or before such       
earlier date as BHP Billiton, subject to the UK Code and other applicable       
laws, may decide.  To the extent that such options are not so exercised,        
and if the Rio Tinto plc Offer becomes or is declared unconditional in          
all respects, BHP Billiton will make appropriate proposals to option            
holders under the Rio Tinto plc Share Schemes in due course.                    
The Rio Tinto Limited Offer will extend to any Rio Tinto Limited Shares         
unconditionally allotted or issued fully paid (or credited as fully paid)       
while the Rio Tinto Limited Offer remains open for acceptance upon              
exercise of options or securities granted under the Rio Tinto Limited           
Share Schemes, being options or securities in existence as at the Rio           
Tinto Limited Register Date.  If BHP Billiton becomes entitled to acquire       
such options or securities compulsorily under Part 6A.2 of the Australian       
Corporations Act, BHP Billiton intends to proceed with compulsory               
acquisition of those options or securities.                                     
15. Share Sale Facility under the Rio Tinto plc Offer for New BHP               
Billiton Limited Shares                                                         
To the extent consistent with applicable law in relevant jurisdictions,         
BHP Billiton intends to arrange for a free Share Sale Facility to be made       
available as part of the Rio Tinto plc Offer in relation to the New BHP         
Billiton Limited Shares issued to Rio Tinto plc Shareholders who (i) hold       
fewer than 25,000 Rio Tinto plc Shares; and (ii) do not elect for New BHP       
Billiton Limited Shares under the Mix and Match Facility in excess of           
their basic entitlements.  Qualifying Rio Tinto plc Shareholders will be        
able to sell all, but not some, of the New BHP Billiton Limited Shares          
they receive under the Rio Tinto plc Offer without incurring any charges        
(including dealing charges and settlement charges) and to receive the           
proceeds of the sale in British pounds. The Share Sale Facility will not        
be available to Rio Tinto plc Shareholders resident in jurisdictions            
where making such a facility available is unlawful. Further details of          
this free Share Sale Facility will be provided in the Rio Tinto plc Offer       
Document.                                                                       
16. Taxation                                                                    
It is expected that capital gains tax rollover relief will be available         
to UK resident shareholders accepting the Rio Tinto plc Offer in respect        
of their New BHP Billiton Plc Shares and New BHP Billiton Limited Shares        
subject to approximately 70 per cent acceptances under the Rio Tinto plc        
Offer.                                                                          
If BHP Billiton Limited is able to proceed with the compulsory                  
acquisition of any remaining Rio Tinto Limited Shares, BHP Billiton             
Limited expects capital gains tax rollover relief to be available to            
Australian resident shareholders accepting the Rio Tinto Limited Offer.         
Given the size of the Rio Tinto Limited Cross-holding, to reach the             
compulsory acquisition thresholds in relation to Rio Tinto Limited:             
- Some or all of this holding will need to be accepted into the Rio Tinto       
Limited Offer by Rio Tinto plc; or                                              
- ASIC will need to provide relief from the Australian Corporations Act.        
ASIC has indicated that it would consider an application for this relief        
on its merits if it becomes apparent that the Rio Tinto Limited Cross-          
holding has a clear defensive effect.                                           
Shareholders accepting the Rio Tinto plc Offer or Rio Tinto Limited Offer       
who are US citizens or residents are expected to be subject to US tax on        
the receipt of the Rio Tinto plc Offer and the Rio Tinto Limited Offer          
consideration, respectively.                                                    
17. Overseas shareholders                                                       
The availability of the Rio Tinto plc Offer and Rio Tinto Limited Offer         
to persons not resident in the UK, Australia or the US may be affected by       
the laws of the relevant jurisdiction where they are resident. Rio Tinto        
shareholders who are not resident in the UK, Australia or the US should         
inform themselves about, and observe, any applicable requirements.              
The Offers are not being made in or into, and are not capable of                
acceptance in Japan or any other jurisdiction where to do so would              
constitute a violation of the laws of such jurisdiction, or by the use of       
the mails or by any means or instrumentality (including without                 
limitation, facsimile transmission, telephone and/or the internet) of           
interstate or foreign commerce, or any facility of a national securities        
exchange, of any such jurisdiction.                                             
The Rio Tinto Limited Offer will not necessarily be registered in any           
jurisdiction outside Australia (unless an applicable foreign law treats         
it as registered as a result of the BHP Billiton Bidder`s Statement being       
lodged with ASIC).  Any shareholder who wishes to accept the Rio Tinto          
Limited Offer must first satisfy itself that such acceptance is permitted       
by any foreign law applicable to that shareholder.  If any authority or         
clearance under Australian law is required to enable a shareholder in Rio       
Tinto Limited to receive any consideration under the Rio Tinto Limited          
Offer, any acceptance of the Rio Tinto Limited Offer will not create any        
right to receive that consideration unless and until all requisite              
authorities or clearances have been received.  The Rio Tinto Limited            
Offer may provide that securities which would otherwise be issued to an         
accepting shareholder resident in a jurisdiction outside Australia may be       
vested in a nominee and sold, with the net proceeds of sale remitted to         
the accepting shareholder.                                                      
18. Shareholder approval                                                        
In view of the size of Rio Tinto, among other things, it will be                
necessary for BHP Billiton shareholders to approve the Acquisition.             
Accordingly, the necessary resolutions will be put to an extraordinary          
general meeting of each of BHP Billiton Limited and BHP Billiton Plc once       
the Pre-conditions have been satisfied or waived.                               
19. Timing                                                                      
The Rio Tinto plc Offer, Rio Tinto Limited Offer and the posting of the         
documents related to each are subject to satisfaction or waiver of the          
Pre-conditions which relate to the obtaining of certain clearances in           
Europe, Australia, the United States, Canada and South Africa.  BHP             
Billiton intends to proceed with the Offers through despatching the Rio         
Tinto plc Offer Document and the US Offer document, in the case of the          
Rio Tinto plc Offer, and the BHP Billiton Bidder`s Statement, in the case       
of the Rio Tinto Limited Offer, as soon as practicable after the                
satisfaction or waiver of the Pre-conditions. The necessary clearances          
are expected to be obtained during the second half of 2008.                     
20. Compulsory acquisition, delisting and cancellation of voting                
Rio Tinto plc Offer                                                             
If the Rio Tinto plc Offer becomes or is declared unconditional in all          
respects, it is the intention of BHP Billiton, assuming it becomes so           
entitled, to acquire compulsorily any outstanding Rio Tinto plc Shares          
pursuant to the provisions of the UK Companies Act 2006, including any          
Rio Tinto plc Shares underlying the Rio Tinto plc ADRs.                         
Following the Rio Tinto plc Offer becoming or being declared                    
unconditional in all respects and sufficient acceptances being received,        
BHP Billiton intends to procure that Rio Tinto will apply for the               
cancellation of the listing of the Rio Tinto plc Shares on the Official         
List and trading on the London Stock Exchange for listed securities and         
the delisting of the Rio Tinto plc ADRs on the New York Stock Exchange.         
De-listing is likely to reduce significantly the liquidity and                  
marketability of any Rio Tinto plc Shares or Rio Tinto plc ADRs in              
respect of which the Rio Tinto plc Offer has not been accepted.                 
Following the delisting of the Rio Tinto plc ADRs from the New York Stock       
Exchange, BHP Billiton intends to procure that Rio Tinto files with the         
SEC a request that Rio Tinto`s reporting obligations under the Exchange         
Act be terminated, if and when Rio Tinto plc is eligible to do so.              
Rio Tinto Limited Offer                                                         
If the Rio Tinto Limited Offer becomes or is declared unconditional in          
all respects, it is the intention of BHP Billiton, assuming it becomes so       
entitled, to acquire compulsorily any outstanding Rio Tinto Limited             
Shares other than the Rio Tinto Limited Cross-holding in accordance with        
the provisions of the Australian Corporations Act.  BHP Billiton may also       
compulsorily acquire some or all of the Rio Tinto Limited Cross-holding.        
If BHP Billiton becomes entitled to acquire any other outstanding Rio           
Tinto Limited securities held other than by a member of the Rio Tinto           
Group compulsorily under the Australian Corporations Act, BHP Billiton          
intends to proceed with such compulsory acquisition.                            
BHP Billiton intends to procure that Rio Tinto Limited is removed from          
the official list of ASX following completion of compulsory acquisition         
of the Rio Tinto Limited Shares.                                                
21. Listing, dealings and settlement                                            
Application will be made for the New BHP Billiton Plc Shares to be              
admitted to the Official List of the UK Listing Authority and to trading        
on the London Stock Exchange`s market for listed securities.                    
It is expected that admission will become effective and that dealings for       
normal settlement in the New BHP Billiton Plc Shares will commence              
shortly following the date on which the Rio Tinto plc Offer becomes or is       
declared unconditional in all respects (save only for the admission of          
such shares becoming effective). The New BHP Billiton Plc Shares will,          
when issued, be fully paid and rank pari passu in all respects with the         
existing BHP Billiton Plc Shares, including, where the record date for          
determining entitlements is on or after the date of issue of New BHP            
Billiton Plc Shares, the right to all dividends and other distributions         
(if any) declared, made or paid by BHP Billiton Plc save that BHP               
Billiton reserves the right to withhold any dividend not yet paid for the       
half year ended 31 December 2008 or any subsequent period if Rio Tinto          
shareholders would otherwise receive a Rio Tinto dividend and a BHP             
Billiton dividend for the same period or a substantial part of that             
period.                                                                         
In addition, application will be made to the New York Stock Exchange for        
listing of the new BHP Billiton Limited ADRs (representing New BHP              
Billiton Limited Shares) and the new BHP Billiton Plc ADRs (representing        
New BHP Billiton Plc Shares) being offered in the US Offer.                     
Application will be made for the New BHP Billiton Limited Shares to be          
admitted to quotation on ASX. It is expected that admission will become         
effective upon issue and allotment of the New BHP Billiton Limited Shares       
to accepting Rio Tinto shareholders and provision of standard information       
to ASX, and that such New BHP Billiton Limited Shares may be traded on          
ASX as from that time.  The New BHP Billiton Limited Shares will, when          
issued, be fully paid and rank pari passu in all respects with existing         
BHP Billiton Limited Shares, including, where the record date for               
determining entitlements is on or after the date of issue of New BHP            
Billiton Limited Shares, the right to all dividends and other                   
distributions (if any) declared, made or paid by BHP Billiton Limited           
save that BHP Billiton reserves the right to withhold any dividend not          
yet paid for the half year ending 31 December 2008 or any subsequent            
period if Rio Tinto shareholders would otherwise receive a Rio Tinto            
dividend and a BHP Billiton dividend for the same period or a substantial       
part of that period.                                                            
22. Regulatory Relief for the Rio Tinto Limited Offer                           
BHP Billiton has consulted with, and obtained certain relief from ASIC in       
connection with the Offer.  The relevant items of relief will be                
available on BHP Billiton`s website in due course.                              
The key items of relief which have been obtained to date may be                 
summarised as follows:                                                          
ASIC has granted modifications and exemptions of the Australian                 
Corporations Act which:                                                         
(i) Relieve BHP Billiton from the requirement in the Australian                 
Corporations Act to despatch the Rio Tinto Limited Offer within two             
months after the Announcement Date, provided that:                              
(b) BHP Billiton Limited makes the Offers set out in this Announcement;         
(c) The announcement indicates (as BHP Billiton now confirms to be the          
case) that the Rio Tinto Limited Offer and the Rio Tinto plc Offer will         
be declared free of defeating conditions or will otherwise become wholly        
unconditional at or about the same time;                                        
(d) Within 1 month of 6 February 2008, BHP Billiton provides ASIC with a        
deed (that cannot be varied or revoked without ASIC`s consent) which            
provides that:                                                                  
(i) BHP Billiton Limited use reasonable endeavours to satisfy the Pre-          
conditions as soon as practicable and immediately notifies ASX of               
material developments in satisfaction or waiver of the Pre-conditions;          
(ii) the BHP Billiton Bidder`s Statement is despatched within one month         
after the date on which the last of the Pre-conditions is satisfied or          
waived and at or about the same time as the Rio Tinto plc Offer Documents       
are despatched; and                                                             
(iii) the Rio Tinto Limited Offer and the Rio Tinto plc Offer  become           
wholly unconditional at or about the same time.                                 
The effect of this relief is that BHP Billiton will not be required to          
despatch the Bidder`s Statement in relation to Rio Tinto Limited until          
one month after the date on which the last of the Pre-conditions is             
satisfied or waived.                                                            
(ii) Modify (provided the requirements in (a) to (c) of (i) above are           
met):                                                                           
(a) the minimum bid price rule in section 621 such that it applies to           
consideration provided during the four month period prior to the                
Announcement Date until the date of the bid;                                    
(b) the rule against escalators prohibiting benefits linked to bids and         
proposed bids in section 622 such that it applies during the period six         
months prior to the Announcement Date until the date of the bid;                
(c) the maximum offer period in section 624 such that the period between        
the Announcement Date and the close of the Rio Tinto Limited Offer Period       
is no longer than 14 months (ASIC has indicated that it would consider          
any application to extend this period on its merits); and                       
(d) the Bidder`s Statement content requirements set out in                      
section 636(1)(h) and (i) such that each requirement applies to the             
period four months prior to the Announcement Date until the date of the         
bid.                                                                            
ASIC has also made "in principle" decisions to grant relief which will:         
(i) Permit acquisitions of relevant interests in Rio Tinto Limited Shares       
which occur by reason of acceptance of the Rio Tinto plc Offer on certain       
conditions, modifying ASIC Instrument 01/1041 dated 8 August 2001 (the          
2001 Instrument).  The 2001 Instrument was obtained by Rio Tinto Limited        
and permits an acquisition of a relevant interest in Rio Tinto Limited          
Shares to occur as a result of a procedure in relation to Rio Tinto plc         
Shares, provided that, among other things, Rio Tinto Limited Shareholders       
and Rio Tinto plc Shareholders are afforded equivalent treatment in terms       
of the consideration offered for their shares (having regard to the             
Equalisation Ratio, as defined in the constitution of Rio Tinto Limited),       
the information provided to them, the time to consider the offer or             
procedure, the conditions to which the procedure is subject and the other       
terms of the procedure.                                                         
ASIC has indicated that the requirements of the modified ASIC relief will       
include:                                                                        
(e) the scrip consideration offered to each Rio Tinto Limited Shareholder       
on the one hand and each Rio Tinto plc Shareholder on the other hand            
being the same number of BHP Billiton shares (either BHP Billiton Limited       
Shares or BHP Billiton Plc Shares or a combination of both); and                
(f) each of BHP Billiton and Rio Tinto remaining DLCs and retaining an          
Equalisation Ratio of one to one during the Rio Tinto Limited Offer             
Period.                                                                         
(ii) Provide that, where the issue of BHP Billiton Limited Shares               
(relevant shares) as consideration for acceptance of Rio Tinto Limited          
Shares into the Rio Tinto Limited Offer or for compulsory acquisition of        
Rio Tinto Limited Shares would otherwise be void under section 259C(1) of       
the Australian Corporations Act, grant an exemption under section 259C(2)       
is granted on condition that:                                                   
(g) BHP Billiton Limited and BHP Billiton Plc and their controlled              
entities will not exercise any voting rights, nor control or influence          
the exercise of voting rights, attaching to the relevant shares; and            
(h) If a third party makes an offer for BHP Billiton Limited ordinary           
shares, BHP Billiton will convene a meeting, as required by ASIC, to            
consider approving acceptance of the relevant shares into the offer.            
This relief could be applicable if Rio Tinto plc or a controlled entity         
were to accept the Rio Tinto Limited Offer, or BHP Billiton Limited were        
to initiate compulsory acquisition in relation to Rio Tinto Limited             
Shares held by Rio Tinto plc or a controlled entity, at a time when Rio         
Tinto plc was a controlled entity of BHP Billiton Limited.                      
(iii) Provide prospectus, secondary sale and licensing relief in                
accordance with ASIC Consultation Paper 79.                                     
23. General                                                                     
Save as disclosed below, as at the date of this Announcement, neither BHP       
Billiton nor any of the directors of BHP Billiton, nor, so far as the           
directors of BHP Billiton are aware, any person acting in concert with          
BHP Billiton, has any interest in or right to subscribe for any Rio Tinto       
shares or has any short position including any short positions under a          
derivative, any agreement to sell, or any delivery obligation or right to       
require another person to take delivery in Rio Tinto plc Shares or Rio          
Tinto Limited Shares or has borrowed or lent any Rio Tinto plc Shares or        
Rio Tinto Limited Shares (save for any borrowed shares which have either        
been on-lent or sold):                                                          
Name                     Number of shares                                       
                    Rio Tinto     Rio Tinto     ADRs                            
                    Limited       Plc Shares                                    
Shares                                                      
Goldman Sachs & Co.  -             -             312 (short)                    
Goldman Sachs & Co.  -             -             3,174                          
(as discretionary                                                               
manager)                                                                        
Goldman Sachs        -             2,800         -                              
International (as                                                               
discretionary                                                                   
manager)                                                                        
UBS                  234,941       148,024       -                              
Merril Lynch         -             5,385,355     -                              
International                                                                   
Merril Lynch,        -             308,978       -                              
Pierce, Fenner &                                                                
Smith                                                                           
HSBC                 814,913       20,675        11                             
772,004                                                     
                    (short)                                                     
Don Argus            78,675(7)     -             -                              
David Crawford       3,025(8)      -             -                              
David Morgan         28,104(9)     -             -                              
The Rio Tinto plc Offer will comply with the applicable rules and               
regulations of the UK Listing Authority, the London Stock Exchange and          
the UK Code.  The Rio Tinto plc Offer will be governed by English Law and       
will be subject to the jurisdiction of the English courts and the Rio           
Tinto plc Offer Conditions and further terms set out in Appendix II, and        
the full terms set out in the Rio Tinto plc Offer Document.  In addition,       
the US Offer component of the Rio Tinto plc Offer is subject to, and will       
comply with, applicable requirements of US securities laws. BHP Billiton        
will only be able to invoke a Pre-condition, Rio Tinto plc Offer                
Condition and/or a Rio Tinto Limited Offer Condition with the prior             
approval of the UK Panel.                                                       
The Rio Tinto Limited Offer will comply with the Australian Corporations        
Act (as it applies to BHP Billiton) and the applicable rules of the ASX.        
The Rio Tinto Limited Offer will be governed by the law of the State of         
Victoria, Australia and will be subject to the jurisdiction of the              
Australian Takeovers Panel and the Australian Courts and the Rio Tinto          
Limited Offer Conditions and terms set out in Appendix III, and the full        
terms set out in the BHP Billiton Bidder`s Statement.                           
Goldman Sachs International and Gresham Partners are acting as principal        
financial advisers to BHP Billiton in relation to the Offers for Rio            
Tinto.                                                                          
BNP Paribas SA ("BNP Paribas"), Citigroup Global Markets Limited                
("Citi"), HSBC Bank plc ("HSBC"), Lazard & Co., Limited ("Lazard"),             
Merrill Lynch International and UBS (UBS Investment Bank, being UBS AG,         
Australia Branch and/or UBS Limited) are also providing financial advice        
to BHP Billiton.                                                                
The banks participating in the committed bank financing facility of US$55       
billion as Mandated Lead Arrangers are: Barclays Capital (the investment        
banking division of Barclays Bank PLC); BNP Paribas; Citigroup Global           
Markets Limited; Goldman Sachs International; HSBC Bank plc; Banco              
Santander, S.A.; and UBS Limited.                                               
Contacts:                                                                       
Australia                                                                       
Don Carroll, Investor Relations                                                 
Tel: +61 3 9609 2686  Mobile: +61 417 591 938                                   
email: Don.A.Carroll@bhpbilliton.com                                            
Samantha Evans, Media Relations                                                 
Tel: +61 3 9609 2898  Mobile: +61 400 693 915                                   
email: Samantha.Evans@bhpbilliton.com                                           
United Kingdom                                                                  
Andre Liebenberg, Investor Relations                                            
Tel: +44 20 7802 4131  Mobile: +44 7920 236 974                                 
email: Andre.Liebenberg@bhpbilliton.com                                         
Illtud Harri, Media Relations                                                   
Tel: +44 20 7802 4195  Mobile: +44 7920 237 246                                 
email: Illtud.Harri@bhpbilliton.com                                             
United States                                                                   
Tracey Whitehead, Investor & Media Relations                                    
Tel: US +1 713 599 6100 or UK +44 20 7802 4031                                  
Mobile: +44 7917 648 093                                                        
email: Tracey.Whitehead@bhpbilliton.com                                         
South Africa                                                                    
Alison Gilbert, Investor Relations                                              
Tel: SA +27 11 376 2121 or UK +44 20 7802 4183                                  
Mobile: +44 7769 936 227                                                        
email: Alison.Gilbert@bhpbilliton.com                                           
Appendix I contains the Pre-conditions to the Offers.                           
Appendix II contains the Rio Tinto plc Offer Conditions and certain             
further terms of the Rio Tinto plc Offer.                                       
Appendix III contains the Rio Tinto Limited Offer Conditions and certain        
further terms of the Rio Tinto Limited Offer.                                   
Appendix IV provides further information on the bases and sources for           
certain information contained in this Announcement.                             
Appendix V sets out supporting letters from KPMG and Goldman Sachs              
International relating to the statement of estimated costs savings and          
volume-driven benefits.                                                         
Appendix VI sets out Definitions contained in the Announcement.                 
This Announcement is for information purposes only and does not                 
constitute an offer or invitation to acquire or dispose of any securities       
or investment advice in any jurisdiction. Any offer, invitation or              
inducement to acquire or dispose of any securities of BHP Billiton Plc,         
BHP Billiton Limited, Rio Tinto plc and/or Rio Tinto Limited will be made       
solely by means of the BHP Billiton Prospectus, the BHP Billiton Bidder`s       
Statement, the Rio Tinto plc Offer Document and associated documents            
expected to be published on satisfaction of the Pre-conditions, and any         
decision to keep, buy or sell shares in Rio Tinto plc or Rio Tinto              
Limited should be made solely on the basis of the information contained         
in such documents.  In addition, BHP Billiton shareholders are urged to         
read the BHP Billiton Prospectus and associated class 1 shareholder             
circular/explanatory statement before making any decision regarding the         
proposed transaction. The BHP Billiton Prospectus, BHP Billiton Bidder`s        
Statement, Rio Tinto plc Offer Document and related documents, once             
published, may be obtained from BHP Billiton`s website at                       
www.bhpbilliton.com or on request from BHP Billiton.                            
Information Relating to the US Offer for Rio Tinto plc                          
BHP Billiton plans to register the offer and sale of securities it would        
issue to Rio Tinto plc US shareholders and Rio Tinto plc ADR holders by         
filing with the SEC a Registration Statement (the "Registration                 
Statement"), which will contain a prospectus ("Prospectus"), as well as         
other relevant materials.  No such materials have yet been filed.  This         
communication is not a substitute for any Registration Statement or             
Prospectus that BHP Billiton may file with the SEC.                             
U.S. INVESTORS AND U.S. HOLDERS OF RIO TINTO PLC SECURITIES AND ALL             
HOLDERS OF RIO TINTO PLC ADRs ARE URGED TO READ ANY REGISTRATION                
STATEMENT, PROSPECTUS AND ANY OTHER DOCUMENTS MADE AVAILABLE TO THEM            
AND/OR FILED WITH THE SEC REGARDING THE POTENTIAL TRANSACTION, AS WELL AS       
ANY AMENDMENTS AND SUPPLEMENTS TO THOSE DOCUMENTS, WHEN THEY BECOME             
AVAILABLE BECAUSE THEY WILL CONTAIN IMPORTANT INFORMATION.                      
Investors and security holders will be able to obtain a free copy of the        
Registration Statement and the Prospectus as well as other relevant             
documents filed with the SEC at the SEC`s website (http://www.sec.gov),         
once such documents are filed with the SEC.  Copies of such documents may       
also be obtained from BHP Billiton without charge, once they are filed          
with the SEC.                                                                   
Information for US Holders of Rio Tinto Limited Shares                          
BHP Billiton Limited is not required to, and does not plan to, prepare          
and file with the SEC a registration statement in respect of the Rio            
Tinto Limited Offer.  Accordingly, Rio Tinto Limited Shareholders should        
carefully consider the following:                                               
The Rio Tinto Limited Offer will be an exchange offer made for the              
securities of a foreign company. Such offer is subject to disclosure            
requirements of a foreign country that are different from those of the          
United States. Financial statements included in the document will be            
prepared in accordance with foreign accounting standards that may not be        
comparable to the financial statements of United States companies.              
Information Relating to the US Offer for Rio Tinto plc and the Rio Tinto        
Limited Offer for Rio Tinto shareholders located in the US                      
It may be difficult for you to enforce your rights and any claim you may        
have arising under the US federal securities laws, since the issuers are        
located in a foreign country, and some or all of their officers and             
directors may be residents of foreign countries. You may not be able to         
sue a foreign company or its officers or directors in a foreign court for       
violations of the US securities laws. It may be difficult to compel a           
foreign company and its affiliates to subject themselves to a US court`s        
judgement.                                                                      
You should be aware that BHP Billiton may purchase securities of Rio            
Tinto plc and Rio Tinto Limited otherwise than under the exchange offer,        
such as in open market or privately negotiated purchases.                       
The Offers are not being made in or into, and are not capable of                
acceptance in Japan or any other jurisdiction where to do so would              
constitute a violation of the laws of such jurisdiction, or by the use of       
the mails or by any means or instrumentality (including without                 
limitation, facsimile transmission, telephone and/or the internet) of           
interstate or foreign commerce, or any facility of a national securities        
exchange, of such jurisdiction.                                                 
The Rio Tinto Limited Offer will not necessarily be registered in any           
jurisdiction outside Australia (unless an applicable foreign law treats         
it as registered as a result of the BHP Billiton Bidder`s statement being       
lodged with ASIC).  Any Rio Tinto Limited Shareholder who wishes to             
accept the Rio Tinto Limited Offer must first satisfy itself that such          
acceptance is permitted by any foreign law applicable to that                   
shareholder.  If any authority or clearance under Australian law is             
required to enable a shareholder in Rio Tinto Limited to receive any            
consideration under the Rio Tinto Limited Offer, any acceptance of the          
Rio Tinto Limited Offer will not create any right to receive that               
consideration unless and until all requisite authorities or clearances          
have been received.                                                             
Goldman Sachs International, which is authorised and regulated in the           
United Kingdom by the Financial Services Authority, is acting exclusively       
as principal financial adviser and corporate broker for BHP Billiton in         
relation to the matters described in this Announcement and is not               
advising any other person and accordingly will not be responsible to any        
person other than BHP Billiton for providing the protections afforded to        
the customers of Goldman Sachs International or for providing advice in         
relation to matters described in this Announcement.                             
Gresham Partners, which holds an Australian Financial Services Licence          
under the Australian Corporations Act, is acting exclusively for BHP            
Billiton as principal financial adviser in relation to the matters              
described in this Announcement and will not be responsible to anyone            
other than BHP Billiton for providing the protections afforded to the           
clients of Gresham Partners nor for providing advice in relation to             
matters described in this Announcement.                                         
BNP Paribas, which is authorised and regulated in the United Kingdom by         
the Financial Services Authority, is providing financial advice to BHP          
Billiton in relation to the matters described in this Announcement and is       
not advising any other person and accordingly will not be responsible to        
any person other than BHP Billiton for providing the protections afforded       
to the customers of BNP Paribas or for providing advice in relation to          
matters described in this Announcement.                                         
Citi, which is authorised and regulated in the United Kingdom by the            
Financial Services Authority, is providing financial advice and acting as       
corporate broker to BHP Billiton in relation to the matters described in        
this Announcement and is not advising any other person and accordingly          
will not be responsible to any person other than BHP Billiton for               
providing the protections afforded to the customers of Citi or for              
providing advice in relation to matters described in this Announcement.         
HSBC, which is authorised and regulated in the United Kingdom by the            
Financial Services Authority, is providing financial advice to BHP              
Billiton in relation to the matters described in this Announcement and is       
not advising any other person and accordingly will not be responsible to        
any person other than BHP Billiton for providing the protections afforded       
to the customers of HSBC or for providing advice in relation to matters         
described in this Announcement.                                                 
Lazard, which is authorised and regulated in the United Kingdom by the          
Financial Services Authority, is providing financial advice to BHP              
Billiton in relation to the matters described in this Announcement and is       
not advising any other person and accordingly will not be responsible to        
any person other than BHP Billiton for providing the protections afforded       
to the customers of Lazard or for providing advice in relation to matters       
described in this Announcement.                                                 
Merrill Lynch International, which is authorised and regulated in the           
United Kingdom by the Financial Services Authority, is providing                
financial advice and acting as corporate broker to BHP Billiton in              
relation to the matters described in this Announcement and is not               
advising any other person and accordingly will not be responsible to any        
person other than BHP Billiton for providing the protections afforded to        
the customers of Merrill Lynch International or for providing advice in         
relation to matters described in this Announcement.                             
UBS Investment Bank is providing financial advice to BHP Billiton in            
relation to the matters described in this Announcement and is not               
advising any other person and accordingly will not be responsible to any        
person other than BHP Billiton for providing the protections afforded to        
the clients of UBS or for providing advice in relation to matters               
described in this Announcement.                                                 
The banks participating in the committed bank financing facility of US$55       
billion are as follows:                                                         
As Mandated Lead Arranger: Barclays Capital (the investment banking             
division of Barclays Bank PLC); BNP Paribas; Citigroup Global Markets           
Limited; Goldman Sachs International; HSBC Bank plc; Banco Santander,           
S.A.; and UBS Limited.                                                          
As Underwriter: Barclays Bank PLC; BNP Paribas; Citibank N.A., London           
Branch; Goldman Sachs Credit Partners L.P.; HSBC Bank plc; Banco                
Santander,S.A.; and UBS AG, London Branch.                                      
It is possible that this Announcement could or may contain forward-             
looking statements that are based on current expectations or beliefs, as        
well as assumptions about future events.  Reliance should not be placed         
on any such statements because of their very nature, they are subject to        
known and unknown risks and uncertainties and can be affected by other          
factors that could cause actual results, and BHP Billiton`s plans and           
objectives, to differ materially from those expressed or implied in the         
forward-looking statements.                                                     
None of the statements concerning expected cost savings, volume-driven          
benefits (and resulting incremental EBITDA) and earnings per share              
accretion in this Announcement should be interpreted to mean that the           
future earnings per share of the Enlarged Group for current or future           
financial years will necessarily match or exceed the historical or              
published earnings per share of BHP Billiton, and the actual cost savings       
and volume-driven benefits (and resulting EBITDA enhancement) may be            
materially greater or less than estimated.                                      
There are several factors which could cause actual results to differ            
materially from those expressed or implied in forward-looking statements.       
Among the factors that could cause actual results to differ materially          
from those described in the forward-looking statements are BHP Billiton`s       
ability to successfully combine the businesses of BHP Billiton and Rio          
Tinto and to realise expected synergies from that combination, changes in       
the global, political, economic, business, competitive, market and              
regulatory forces, future exchange and interest rates, changes in tax           
rates and future business combinations or dispositions.                         
BHP Billiton does not undertake any obligation (except as required by           
law, the Listing Rules of ASX Limited or the rules of the UK Listing            
Authority and the London Stock Exchange) to revise or update any forward-       
looking statement contained in this Announcement, regardless of whether         
those statements are affected as a result of new information, future            
events or otherwise.                                                            
Under the provisions of Rule 8.3 of the Takeover Code (the "Code"), if          
any person is, or becomes, "interested" (directly or indirectly) in one         
per cent or more of any class of "relevant securities" of any of BHP            
Billiton Plc, BHP Billiton Limited, Rio Tinto plc or Rio Tinto Limited,         
all "dealings" in any "relevant securities" of that company (including by       
means of an option in respect of, or a derivative referenced to, any such       
"relevant securities") must be publicly disclosed by no later than 3.30         
pm (London time) on the London business day following the date of the           
relevant transaction.                                                           
The relevant disclosure must include details of all "interests" or              
"dealings" in any class of "relevant" securities of the other company           
which is part of its DLC structure.  Therefore, if, for example, a              
disclosure is being made in respect of a dealing in securities of BHP           
Billiton Plc, an accompanying disclosure must also be made of interests         
or short positions held in securities of BHP Billiton Limited, even if          
the person`s interest or short position is less than one per cent of the        
relevant class.  The same approach should be adopted in respect of              
securities of Rio Tinto plc and Rio Tinto Limited.  Therefore, each             
disclosure should consist of two Rule 8.3 disclosure forms, one for the         
Plc arm of the DLC structure and one for the Limited arm of the DLC             
structure, released as one announcement.                                        
This requirement will continue until the date on which the Offers become,       
or are declared, unconditional as to acceptances, lapse or are otherwise        
withdrawn or on which the "Offer Period" otherwise ends. If two or more         
persons act together pursuant to an agreement or understanding, whether         
formal or informal, to acquire an "interest" in "relevant securities" of        
BHP Billiton Plc, BHP Billiton Limited, Rio Tinto plc or Rio Tinto              
Limited, they will be deemed to be a single person for the purpose of           
Rule 8.3.                                                                       
Under the provisions of Rule 8.1 of the Code, all "dealings" in "relevant       
securities" of either BHP Billiton or Rio Tinto by BHP Billiton or Rio          
Tinto, or by any of their respective "associates", must be disclosed by         
no later than 12.00 noon (London time) on the London business day               
following the date of the relevant transaction.                                 
A disclosure table, giving details of the companies in whose "relevant          
securities" "dealings" should be disclosed, and the number of such              
securities in issue, can be found on the UK Panel`s website at                  
www.thetakeoverpanel.org.uk.                                                    
"Interests in securities" arise, in summary, when a person has long             
economic exposure, whether conditional or absolute, to changes in the           
price of securities. In particular, a person will be treated as having an       
"interest" by virtue of the ownership or control of securities, or by           
virtue of any option in respect of, or derivative referenced to,                
securities.                                                                     
Terms in quotation marks are defined in the Code, which can also be found       
on the UK Panel`s website. If you are in any doubt as to whether or not         
you are required to disclose a "dealing" under Rule 8, you should consult       
the UK Panel.                                                                   
APPENDIX I                                                                      
PRE-CONDITIONS TO THE RIO TINTO PLC OFFER AND THE RIO TINTO LIMITED OFFER       
The making of:                                                                  
* the Rio Tinto plc Offer by the posting of the Rio Tinto plc Offer             
Document and Rio Tinto plc Offer Form of Acceptance; and                        
* the Rio Tinto Limited Offer by the posting of the BHP Billiton Bidder`s       
Statement and the Rio Tinto Limited Offer Form of Acceptance,                   
will take place following the satisfaction of, or to the extent permitted       
by the UK Panel, waiver by BHP Billiton Limited of, the following Pre-          
conditions:                                                                     
European Union merger control                                                   
(A) insofar as the Acquisition constitutes a concentration with a               
Community dimension within the scope of Council Regulation (EC) 139/2004        
(as amended) (the "Merger Regulation"):                                         
(i) one of the following having occurred:                                       
(a) the European Commission having made a decision declaring the                
concentration compatible with the common market under Article 6(1)(b),          
8(1) or 8(2) of the Merger Regulation; or                                       
(b) the European Commission not having taken a decision in accordance           
with Article 6(1)(b), 6(1)(c), 8(1), 8(2) or 8(3) of the Merger                 
Regulation within the time limits set in Articles 10(1) and 10(3) and is        
thereby deemed to have declared the concentration compatible with the           
common market pursuant to the presumption in Article 10(6) of the Merger        
Regulation; or                                                                  
(c) if the European Commission shall have made a referral to one or more        
competent authorities under Articles 4(4) or 9(1) of the Merger                 
Regulation in connection with part or all of the concentration:                 
1. such competent authorities having issued a decision, finding or              
declaration approving the proposed acquisition and permitting its closing       
without any breach of applicable law or of the Merger Regulation; and           
2. the Pre-condition set out in sub-paragraphs (a) or (b) above having          
been satisfied in respect of any part of the concentration retained to be       
reviewed by the European Commission under the Merger Regulation;                
and                                                                             
(ii) if one or more competent authorities takes appropriate measures to         
protect its legitimate interests pursuant to Article 21(4) of the Merger        
Regulation, such measures not preventing completion of the proposed             
acquisition without a breach of any applicable law or of the Merger             
Regulation;                                                                     
US merger control                                                               
(B) all filings having been made and all or any applicable waiting              
periods (including any extensions thereof) under the United States Hart-        
Scott Rodino Antitrust Improvements Act of 1976 and the regulations             
thereunder having expired, lapsed or been terminated as appropriate in          
each case in respect of the Acquisition and no member of the Rio Tinto          
Group or the BHP Billiton Group being subject to threatened or actual           
litigation, or to any order or injunction of a court of competent               
jurisdiction in the United States that prohibits consummation of the            
Acquisition as a result of action brought by the US Federal Trade               
Commission or US Department of Justice;                                         
Australian foreign investment approval                                          
(C) one of the following having occurred:                                       
(i) BHP Billiton having received written notice issued by or on behalf of       
the Australian Treasurer stating that there are no objections under the         
Australian Government`s foreign investment policy to a Relevant                 
Acquisition, such notice being unconditional; or                                
(ii) the period provided under the Australian FATA during which the             
Australian Treasurer may make an order or interim order under the               
Australian FATA prohibiting a Relevant Acquisition having expired,              
without such an order having been made; or                                      
(iii) if an interim order shall have been made to prohibit a Relevant           
Acquisition, the subsequent period for making a final order having              
elapsed without any such final order having been made;                          
Australian merger control                                                       
(D) either one of the following having occurred:                                
(i) BHP Billiton having received notice in writing from the ACCC to the         
effect that the ACCC does not propose to intervene in or seek to prevent        
the Acquisition pursuant to section 50 of the Australian Trade Practices        
Act, such notice being unconditional; or                                        
(ii) BHP Billiton having been granted clearance or authorisation for the        
Acquisition by the ACCC or the Australian Competition Tribunal under Part       
VII of the Australian Trade Practices Act (such clearance or                    
authorisation being unconditional), and no application for review of such       
clearance or authorisation having been made within the period prescribed        
by such Act;                                                                    
Canadian merger control                                                         
(E) either one of the following having occurred:                                
(i) the Canadian Commissioner having issued an advance ruling certificate       
under section 102(1) of the Canadian Competition Act in respect of the          
Acquisition; or                                                                 
(ii) any applicable waiting period under the Canadian Competition Act           
having expired or been earlier terminated or waived by the Canadian             
Commissioner, and BHP Billiton having been advised by the Canadian              
Commissioner that she has determined that grounds do not exist for her to       
make an application to the Canadian Competition Tribunal under section 92       
of the Canadian Competition Act for an order in respect of the                  
Acquisition, such advice being unconditional; and                               
South African merger control                                                    
(F) the South African Competition Authorities having unconditionally            
approved the Acquisition in terms of Chapter 3 of the South African             
Competition Act.                                                                
BHP Billiton Limited shall be entitled to waive all and any of the above        
Pre-conditions in whole or in part.                                             
APPENDIX II                                                                     
CONDITIONS AND FURTHER TERMS OF THE RIO TINTO PLC OFFER                         
1. Conditions to the Rio Tinto plc Offer                                        
The Rio Tinto plc Offer, which will be made by BHP Billiton Limited will        
comply with the rules and regulations of the Financial Services Authority       
and the London Stock Exchange and the UK Code.                                  
The Rio Tinto plc Offer will be subject to the fulfilment of the                
following conditions:                                                           
Minimum acceptance condition                                                    
(A) valid acceptances being received (and not, where permitted,                 
withdrawn) by not later than 3.00 p.m (London time) on the first closing        
date of the Rio Tinto plc Offer (or such later time(s) and/or date(s) as        
BHP Billiton Limited may, with the consent of the UK Panel or in                
accordance with the UK Code, decide) in respect of the Rio Tinto Plc            
Shares which would result in BHP Billiton Limited and/or any other              
members of the BHP Billiton Group holding Rio Tinto Plc Shares which            
together amount to more than 50 per cent. In nominal value of the total         
number of Rio Tinto Plc Shares, provided that this condition shall not be       
satisfied unless BHP Billiton Limited and/or any members of the BHP             
Billiton Group shall have acquired or agreed to acquire (whether pursuant       
to the Rio Tinto plc Offer or otherwise) Rio Tinto Plc Shares carrying in       
aggregate more than 50 per cent of the voting rights then normally              
exercisable at general meetings of Rio Tinto plc.  For the purposes of          
this condition:                                                                 
(i) shares which have been unconditionally allotted but not issued before       
the Rio Tinto plc Offer becomes or is declared unconditional as to              
acceptances, whether pursuant to the exercise of any outstanding                
subscription or conversion rights or otherwise, shall be deemed to carry        
the voting rights they will carry on being entered into the register of         
members of Rio Tinto plc; and                                                   
(ii) the expression "Rio Tinto plc Shares to which the Rio Tinto plc            
Offer relates" shall be construed in accordance with sections 974 to 991        
of the UK Companies Act 2006.                                                   
European Union merger control                                                   
(B) in the event that Pre-condition (A) is waived, insofar as the               
Acquisition constitutes a concentration with a Community dimension within       
the scope of the Merger Regulation;                                             
(i) one of the following having occurred:                                       
(a) the European Commission having made a decision declaring the            
concentration compatible with the common market under Article 6(1)(b),          
8(1) or 8(2) of the Merger Regulation (or having been deemed to have            
declared the concentration compatible with the common market pursuant to        
the presumption in Article 10(6) of the Merger Regulation); or                  
    (b) the European Commission not having taken a decision in                  
accordance with Article 6(1)(b), 6(1)(c), 8(1), 8(2) or 8(3) of the             
Merger Regulation within the time limits set in Articles 10(1) and 10(3)        
and is thereby deemed to have declared the concentration compatible with        
the common market pursuant to the presumption in Article 10(6) of the           
Merger Regulation; or                                                           
    (c) if the European Commission shall have made a referral to one or         
more competent authorities under Articles 4(4) or 9(1) of the Merger            
Regulation in connection with part or all of the concentration:                 
1. such competent authorities having issued a decision, finding or              
declaration approving the proposed acquisition and permitting its closing       
without any breach of applicable law or of the Merger Regulation; and           
2. the condition set out in sub-paragraphs (a) or (b) above having been         
satisfied in respect of any part of the concentration retained to be            
reviewed by the European Commission under the Merger Regulation;                
and                                                                             
(ii) if one or more competent authorities takes appropriate measures to         
protect its legitimate interests pursuant to Article 21(4) of the Merger        
Regulation, such measures not preventing completion of the proposed             
acquisition without a breach of any applicable law or of the Merger             
Regulation;                                                                     
US merger control                                                               
(C) in the event that Pre-condition (B) is waived, all filings having           
been made and all or any applicable waiting periods (including any              
extensions thereof) under the United States Hart-Scott Rodino Antitrust         
Improvements Act of 1976 and the regulations thereunder having expired,         
lapsed or been terminated as appropriate in each case in respect of the         
Acquisition and no member of the Rio Tinto Group or the BHP Billiton            
Group being subject to threatened or actual litigation, or to any order         
or injunction of a court of competent jurisdiction in the United Sates          
that prohibits consummation of the Acquisition as a result of action            
brought by the US Federal Trade Commission or US Department of Justice;         
Australian foreign investment approval                                          
(D) in the event that Pre-condition (C) is waived, one of the following         
having occurred:                                                                
(i) BHP Billiton having received written notice issued by or on behalf of       
the Australian Treasurer stating that there are no objections under the         
Australian Government`s foreign investment policy to a Relevant                 
Acquisition, such notice being unconditional; or                                
(ii) the period provided under the Australian FATA during which the             
Australian Treasurer may make an order or interim order under the               
Australian FATA prohibiting a Relevant Acquisition having expired without       
such an order having been made; or                                              
(iii) if an interim order shall have been made to prohibit a Relevant           
Acquisition, the subsequent period for making a final order having              
elapsed without any such final order having been made;                          
Australian merger control                                                       
(E) in the event that Pre-condition (D) is waived, either one of the            
following having occurred:                                                      
(i) BHP Billiton having received notice in writing from the ACCC to the         
effect that the ACCC does not propose to intervene in or seek to prevent        
the Acquisition pursuant to section 50 of the Australian Trade Practices        
Act, such notice being unconditional; or                                        
(ii) BHP Billiton having been granted clearance or authorisation for the        
Acquisition by the ACCC or the Australian Competition Tribunal under Part       
VII of the Australian Trade Practices Act (such clearance or                    
authorisation being unconditional), and no application for review of such       
clearance or authorisation having been made within the period prescribed        
by such Act;                                                                    
Canadian merger control                                                         
(F) in the event that Pre-condition (E) is waived, either one of the            
following having occurred:                                                      
(i) the Canadian Commissioner having issued an advance ruling certificate       
under section 102(1) of the Canadian Competition Act in respect of the          
Acquisition; or                                                                 
(ii) any applicable waiting period under the Canadian Competition Act           
having expired or been earlier terminated or waived by the Canadian             
Commissioner, and BHP Billiton having been advised by the Canadian              
Commissioner that she has determined that grounds do not exist for her to       
make an application to the Canadian Competition Tribunal under section 92       
of the Canadian Competition Act for an order in respect of the                  
Acquisition, such advice being unconditional;                                   
South African merger control                                                    
(G) in the event that Pre-condition (F) is waived, the South African            
Competition Authorities having unconditionally approved the Acquisition         
in terms of Chapter 3 of the South African Competition Act;                     
Approvals by Public Authorities                                                 
(H) BHP Billiton having received all Approvals (other than those referred       
to in paragraphs (B) to (G) above, inclusive) which are required by law         
or by any Public Authority:                                                     
(i) to permit the Rio Tinto plc Offer and the Rio Tinto Limited Offer to        
be made and to be accepted by Rio Tinto plc Shareholders and Rio Tinto          
Limited Shareholders, respectively; or                                          
(ii) as a result of the Acquisition and which are necessary for the             
continued operation or ownership of the business or any part of the             
business of any member of the Rio Tinto Group,                                  
and, in each case, those Approvals shall have been on an unconditional          
basis and remain in force in all respects and there has been no notice,         
intimation or indication of intention to revoke, suspend, restrict,             
modify or not renew those Approvals;                                            
No action adversely affecting the Acquisition                                   
(l) during the Relevant Period:                                                 
(i) there having not been any preliminary or final decision, order or           
decree issued by any Public Authority;                                          
(ii) no action, investigation or examination or any other step having           
been taken, instituted, or threatened by any Public Authority;                  
(iii) no application having been made to any Public Authority (other than       
an application by BHP Billiton Limited or any company within the BHP            
Billiton Group);                                                                
which:                                                                          
(iv) restrains, prohibits or impedes, or threatens to restrain, prohibit        
or impede, or may otherwise materially adversely impact upon:                   
(a) the Acquisition (including the making of the Rio Tinto plc Offer or         
the Rio Tinto Limited Offer or the acquisition by BHP Billiton of any           
other securities in Rio Tinto plc or Rio Tinto Limited or any other             
member of the Rio Tinto Group); or                                              
(b) the rights of BHP Billiton Limited in respect of any Rio Tinto plc          
Shares or Rio Tinto Limited Shares to be acquired under the Rio Tinto plc       
Offer or the Rio Tinto Limited Offer or otherwise or any other securities       
in any member of the Rio Tinto Group; or                                        
(v) in consequence of, or in connection with, the Acquisition, seeks to         
require the divestiture by BHP Billiton Limited of any Rio Tinto plc            
Shares or Rio Tinto Limited Shares, or the divestiture of any assets            
(including the variation or termination of any contractual rights) by any       
member of the Rio Tinto Group or by any member of the BHP Billiton Group;       
(vi) in consequence of, or in connection with, the Acquisition, imposes         
any limitation on the ability of any member of the BHP Billiton Group or        
the Rio Tinto Group to conduct their respective businesses (or any of           
them) or to own any of their respective assets or properties or any part        
thereof being a limitation that (individually or together with others)          
has or could reasonably be expected to have a materially adverse effect         
on the assets, liabilities, financial or trading position, profitability,       
production or prospects of any member of the BHP Billiton Group or any          
member of the Rio Tinto Group; or                                               
(vii) in consequence of, or in connection with, the Acquisition, requires       
any member of the BHP Billiton Group to acquire or offer to acquire any         
shares or other securities (or the equivalent) or interest in any body          
corporate or other entity, other than Rio Tinto plc or Rio Tinto Limited        
and during the Relevant Period, all applicable waiting and other time           
periods during which any Public Authority could institute, implement or         
threaten any action, proceeding, suit, investigation, examination,              
enquiry or reference or any other step under the laws of any jurisdiction       
in respect of the Rio Tinto plc Offer or Rio Tinto Limited Offer or the         
acquisition or proposed acquisition of any Rio Tinto plc Shares or Rio          
Tinto Limited Shares having expired, lapsed or terminated;                      
(J) during the Relevant Period no law having been enacted, made,                
proclaimed or decreed, or having been proposed to be enacted, made,             
proclaimed or decreed, which:                                                   
(i) restrains, prohibits or impedes, or threatens to restrain, prohibit         
or impede, or may otherwise materially adversely impact upon:                   
(a) the Acquisition (including the making of the Rio Tinto plc Offer or         
the Rio Tinto Limited Offer or the acquisition by BHP Billiton Limited of       
any other securities in Rio Tinto plc or Rio Tinto Limited or any other         
member of the Rio Tinto Group); or                                              
(b) the rights of BHP Billiton Limited in respect of any Rio Tinto plc          
Shares or Rio Tinto Limited Shares to be acquired under the Rio Tinto plc       
Offer or the Rio Tinto Limited Offer or otherwise or any other securities       
in any member of the Rio Tinto Group; or                                        
(ii) seeks to require the divestiture by BHP Billiton Limited of any Rio        
Tinto plc Shares or Rio Tinto Limited Shares, or the divestiture of any         
assets by (including the variation or termination of any contractual            
rights of) any member of the Rio Tinto Group or by any member of the BHP        
Billiton Group; or                                                              
(iii) imposes any limitation on the ability of any member of the BHP            
Billiton Group or the Rio Tinto Group to conduct their respective               
businesses (or any of them) or to own any of their respective assets or         
properties or any part thereof being a limitation that (individually or         
together with others) has or could reasonably be expected to have a             
materially adverse effect on the assets, liabilities, financial or              
trading position, profitability, production or prospects of any member of       
the BHP Billiton Group or any member of the Rio Tinto Group; or                 
(iv) requires any member of the BHP Billiton Group to acquire or offer to       
acquire any shares or other securities (or the equivalent) or interest in       
any body corporate or other entity other than Rio Tinto plc or Rio Tinto        
Limited;                                                                        
or would do so (in respect of any or all of the foregoing) if enacted,          
made, proclaimed or decreed as proposed;                                        
BHP Billiton shareholder approval                                               
(K) the BHP Billiton Shareholder Resolutions having been passed at the          
BHP Billiton EGMs (or at any adjournment thereof);                              
Quotation of New BHP Billiton Plc Shares, new BHP Billiton Plc ADRs, New        
BHP Billiton Limited Shares and new BHP Billiton Limited ADRs                   
(L) the admission to the UK Official List of the New BHP Billiton Plc           
Shares to be issued in connection with the Rio Tinto plc Offer having           
become effective in accordance with the UK Listing Rules and the                
admission of such shares to trading having become effective in accordance       
with the Admission and Disclosure Standards of the London Stock Exchange        
or if BHP Billiton and Rio Tinto plc so determine and subject to the            
consent of the UK Panel, the UKLA having agreed to admit such shares to         
the UK Official List and the London Stock Exchange having agreed to admit       
such shares to trading subject only to (i) the allotment of such shares         
and/or (ii) the Rio Tinto plc Offer having become or having been declared       
unconditional in all respects;                                                  
(M) permission for the admission to quotation of the New BHP Billiton           
Limited Shares to be issued in connection with the Rio Tinto plc Offer          
having been granted by ASX, subject only to:                                    
(i) the allotment and issue of such shares; and                                 
(ii) the provision of the following information to ASX:                         
(a) the date of allotment and number of shares for which quotation is           
sought;                                                                         
(b) confirmation that the shares have been allocated into the issuer            
sponsored sub register;                                                         
(c) a statement setting out the issued capital of BHP Billiton Limited          
following allotment; and                                                        
(d) a statement setting out the names of the 20 largest holders of BHP          
Billiton Limited Shares and the percentage held by each;                        
(N) confirmation having been received by BHP Billiton that the new BHP          
Billiton Plc ADRs representing the New BHP Billiton Plc Shares and the          
new BHP Billiton Limited ADRs representing the New BHP Billiton Limited         
Shares being offered in the US Offer have been approved for listing,            
subject to official notice of issuance, on the New York Stock Exchange,         
and, absent an available exemption from the registration requirements of        
the Securities Act, the registration statement for the New BHP Billiton         
Plc Shares, the new BHP Billiton Plc ADRs, the New BHP Billiton Limited         
Shares and the new BHP Billiton Limited ADRs to be issued pursuant to the       
US Offer having become effective under the Securities Act, and no stop          
order suspending the effectiveness of the registration statement having         
been issued nor proceedings for that purpose having been initiated or           
threatened by the SEC and BHP Billiton Plc having received all necessary        
US state securities law or blue sky authorizations;                             
Inter-conditionality of Rio Tinto plc Offer and Rio Tinto Limited Offer         
(O) the Rio Tinto Limited Offer having become or having been declared           
free of all Rio Tinto Limited Offer Conditions (other than the Rio Tinto        
plc Offer Defeating Condition);                                                 
Non-existence of certain rights                                                 
(P) no person (other than a member of the BHP Billiton Group) having or         
will have any right (whether subject to conditions or not) under any            
Material Rio Tinto Agreement, in consequence of BHP Billiton Limited            
acquiring securities in Rio Tinto plc or Rio Tinto Limited or a change in       
the control or management of Rio Tinto plc or Rio Tinto Limited or              
otherwise, to:                                                                  
(i) acquire from any member of the Rio Tinto Group, or to require the           
disposal by any member of the Rio Tinto Group of, or to require any             
member of the Rio Tinto Group to offer to dispose of, any Material Rio          
Tinto Asset;                                                                    
(ii) terminate, or to vary the terms or performance of, or to vary the          
rights, obligations and liabilities of any member of the Rio Tinto Group        
under, any Material Rio Tinto Agreement;                                        
(iii) require repayment of any moneys borrowed by or any other                  
indebtedness (actual or contingent) of any member or members of the Rio         
Tinto Group immediately or earlier than their or its stated maturity date       
or repayment date for a material amount in aggregate or withdraw or             
inhibit the ability of any member to borrow moneys or incur indebtedness;       
(iv) enforce, claim, create or vary any mortgage, charge or other               
security interest over any Material Rio Tinto Asset,                            
other than a right for which a written, enforceable, irrevocable and            
unconditional waiver or release has been obtained from the person by Rio        
Tinto plc and Rio Tinto Limited before the end of the Relevant Period,          
and which waiver or release has been publicly disclosed;                        
No material transactions, claims or changes in the conduct of the               
business of the Rio Tinto Group                                                 
(Q) save as disclosed in any public announcement by Rio Tinto plc or Rio        
Tinto Limited in each case delivered to a Regulatory Information Service        
or to the ASX ("Publicly Disclosed") prior to the Announcement Date, no         
member of the Rio Tinto Group having during the Relevant Period:                
(i) acquired, offered to acquire or agreed to acquire one or more shares,       
companies or assets (or an interest in one or more shares, companies or         
assets) for an amount in aggregate that is material;                            
(ii) disposed (including by grant of a mortgage, charge, encumbrance or         
other security interest), offered to dispose or agreed to dispose of:           
(a) one or more shares, companies or assets (or an interest in one or           
more shares, companies or assets) for an amount or having a market value        
in aggregate that is material;                                                  
(b) one or more Iron Ore Assets (or an interest in one or more Iron Ore         
Assets) for an amount or having a market value in aggregate that is             
material in the context of the Iron Ore Business;                               
For the avoidance of doubt                                                      
(c) a disposal of, an offer to dispose of or an agreement to dispose of         
one or more shares or interests in a company or entity which owns               
(directly or indirectly) an interest in an Iron Ore Asset is taken to be        
a disposal of, an offer to dispose of or an agreement to dispose of (as         
the case may be) an interest in that Iron Ore Asset; and                        
(d) a reference to assets in subparagraph (a) above includes (without           
limitation) Iron Ore Assets;                                                    
(iii) entered into or offered to enter into any joint venture, asset or         
profit sharing, partnership, merger of businesses (including through a          
multiple listed companies structure) or of corporate entities:                  
(a) in respect of any Iron Ore Assets having a market value in aggregate        
that is material in the context of the Iron Ore Business; or                    
(b) otherwise involving a material commitment in aggregate;                     
(iv) other than in the ordinary course of business, incurred, committed         
to or brought forward the time for incurring or committing, or granted to       
another person a right the exercise of which would involve a member of          
the Rio Tinto Group incurring or committing to, any capital expenditure         
or liability, or forgone any revenue, for one or more related items or          
amounts that are material in aggregate;                                         
(v) issued or agreed to issue, authorised or proposed the issue of, any         
equity, debt or hybrid security (including any security convertible into        
shares of any class) or rights, warrants or options to subscribe for or         
acquire any such securities, other than Rio Tinto plc Shares or Rio Tinto       
Limited Shares issued as a result of exercise or conversion of any              
options or rights issued or granted pursuant to a Rio Tinto plc Share           
Scheme or Rio Tinto Limited Share Scheme provided that the issue or grant       
of the options or rights was made and publicly disclosed before the             
Announcement Date;                                                              
(vi) recommended, declared, paid or made, or resolved to recommend,             
declare, pay or make any bonus, dividend or other distribution whether          
payable in cash, in specie or otherwise except for half-year and full-          
year dividends payable in cash at a level which is not materially               
different to the past practice of the relevant member of the Rio Tinto          
Group;                                                                          
(vii) made or authorised or proposed or announced an intention to propose       
any change in its loan capital for a material amount in aggregate;              
(viii) issued or agreed to issue any debentures or save in the ordinary         
course of business incurred or increased any indebtedness or become             
subject to any contingent liability for a material amount in aggregate;         
(ix) purchased, bought-back, cancelled, redeemed or repaid any of its own       
shares or other securities or the shares or securities of any other             
member of the Rio Tinto Group, or otherwise reduced its share capital in        
any way, or consolidated or subdivided all or any part of its share             
capital or otherwise converted any or all of its shares into a larger or        
smaller number, or otherwise made any other change to, or reconstruction        
of, any part of its share capital (other than as a consequence of an            
issue of Rio Tinto plc Shares or Rio Tinto Limited Shares upon the              
exercise or conversion of any options or rights issued or granted               
pursuant to a Rio Tinto plc Share Scheme or Rio Tinto Limited Share             
Scheme provided that the issue or grant of the options or rights was made       
and Publicly Disclosed before the Announcement Date);                           
(x) implemented or entered into any scheme or arrangement or compromise         
(including one for a reconstruction or amalgamation of any members of the       
Rio Tinto Group), or a deed of company arrangement, or any analogous            
procedure, scheme or arrangement in any jurisdiction;                           
(xi) entered into, renewed or changed the terms of any contract of              
service with, any director or senior executive of Rio Tinto plc or Rio          
Tinto Limited or another material member of the Rio Tinto Group;                
(xii) taken any corporate action or had any legal proceedings started or        
threatened against it in any jurisdiction and no order or determination         
having been made by a Public Authority:                                         
(a) for its winding-up, dissolution or reorganisation; or                       
(b) for the appointment of a receiver, receiver and manager,                    
administrative receiver, administrator, trustee or similar officer in           
respect of all or any of its assets or revenues; or                             
(c) for the appointment of an administrator, liquidator or provisional          
liquidator,                                                                     
    (or any analogous proceedings in any jurisdiction), and no such             
person having been appointed during the Relevant Period;                        
(xiii) had any claim made or threatened against it, or litigation,              
arbitration proceedings, prosecution or other legal proceedings commenced       
against it, involving a claim of a material amount;                             
(xiv) other than in the ordinary course of business, entered into any           
contract, transaction or arrangement which would be restrictive on the          
business of any member of the Rio Tinto Group or, if the Acquisition is         
completed, the Enlarged Group, where such restriction having had or could       
reasonably be expected to have a materially adverse effect on the assets,       
liabilities, financial or trading position, profitability, production or        
prospects of any member of the Rio Tinto Group or, if the Acquisition is        
completed, any member of the Enlarged Group;                                    
(xv) waived or compromised any claim for a material amount (or for              
amounts which in aggregate are material);                                       
(xvi) made any changes in its Constitution or passed any special                
resolution;                                                                     
(xvii) varied or terminated any of the Rio Tinto DLC Agreements;                
(xviii) borrowed or agreed to borrow any money (except for temporary            
borrowing from its bankers in the ordinary course of business) for a            
material amount (or for amounts which in aggregate are material);               
(xix) released, discharged or modified any substantial obligation to it         
of any person, firm or corporation (or agreed to do so) and such release,       
discharge or modification having had or could reasonably be expected to         
have a materially adverse effect on the assets, liabilities, financial or       
trading position, profitability, production or prospects of any member of       
the Rio Tinto Group;                                                            
(xx) done anything that (individually or together with any other things         
done by the member or any other member of the Rio Tinto Group) having had       
or could reasonably be expected to have a materially adverse effect on          
the assets, liabilities, financial or trading position, profitability,          
production or prospects of any member of the Rio Tinto Group;                   
(xxi) publicly disclosed the existence of any matter described in sub-          
paragraphs (i) to above of this condition (Q); or                               
(xxii) entered into any contract, commitment, arrangement or agreement or       
passed any resolution or made any offer (which remains open for                 
acceptance) with respect to, or publicly announced an intention to, or          
proposal to, do anything described in sub-paragraphs (i) to (xx) above of       
this condition (Q);                                                             
No material adverse change                                                      
(R) during the Relevant Period:                                                 
(i) there having been no occurrence, event or matter, including (without        
limitation):                                                                    
(a) any change in the status or terms of arrangements entered into with         
any member of the Rio Tinto Group, any change in the status or terms of         
any Approvals which are applicable to any member of the Rio Tinto Group         
or any steps having been taken which are likely to result in a change in        
the status or terms of any Approvals which are applicable to any member         
of the Rio Tinto Group (whether or not wholly or partly attributable to         
the making of the Rio Tinto plc Offer or the Rio Tinto Limited Offer or         
the acquisition of any shares in Rio Tinto plc or Rio Tinto Limited);           
(b) any failure by any past or present member of the Rio Tinto Group to         
comply with any law or regulation of any jurisdiction with regard to the        
disposal, spillage, release, discharge, leak or emission of any waste or        
hazardous substance or any substance likely to impair the environment or        
harm human health or animal health or otherwise relating to environmental       
matters or otherwise any such disposal, spillage, release, discharge,           
leak or emission (whether or not the same constituted a non-compliance by       
any person with any such law or regulation, and wherever the same may           
have taken place); or                                                           
(c) any past or present member of the Rio Tinto Group having become             
liable (whether actually or contingently) to make good, repair, reinstate       
or clean up any property or any controlled waters now or previously             
owned, occupied, operated or made use of or controlled by any such past         
or present member of the Rio Tinto Group;                                       
(d) any litigation, arbitration proceedings, prosecution or other legal         
proceedings to which any member of the Rio Tinto Group is or may become a       
party (whether as a plaintiff, defendant or otherwise), or any                  
investigation by any Public Authority against or in respect or any member       
of the Rio Tinto Group, having been instituted, announced or threatened         
by or against or remaining outstanding in respect of any member of the          
Rio Tinto Group;                                                                
(e) any contingent or other liability having arisen;                            
(f) any liability for duty or tax;                                              
(g) any change in law (whether retrospective or not),                           
that (individually or together with others) has had or could reasonably         
be expected to have a materially adverse effect on the assets,                  
liabilities, financial or trading position, profitability, production or        
prospects of the Rio Tinto Group taken as a whole; and                          
(ii) no occurrence, event or matter, as described in sub-paragraph (i)          
above of this condition r, which occurred before the Announcement Date          
but was not apparent from publicly available information before then,           
having become public;                                                           
(S) during the Relevant Period, BHP Billiton Limited not having                 
discovered that any document filed by or on behalf of any member of the         
Rio Tinto Group with any Public Authority or ASIC prior to the                  
Announcement Date contains a material inaccuracy or is misleading               
(whether by omission or otherwise) in a material respect;                       
Withdrawals                                                                     
(T) if after the Rio Tinto plc Offer shall have become or have been             
declared unconditional as to acceptances Rio Tinto plc Shareholders who         
have accepted the Rio Tinto plc Offer having become entitled to withdraw        
their acceptances pursuant to Section 87Q of the Financial Services and         
Markets Act 2000 (UK) Rio Tinto plc Shareholders not having withdrawn           
their acceptances in respect of such number of Rio Tinto plc Shares so          
that the Rio Tinto plc Shares acquired or agreed to be acquired by BHP          
Billiton Limited or any of its wholly-owned subsidiaries, either pursuant       
to the Rio Tinto plc Offer or otherwise, will result in BHP Billiton            
Limited and any of its wholly-owned subsidiaries holding Rio Tinto plc          
Shares which together carry 50 per cent. Or less of the voting rights           
then normally exercisable at general meetings of Rio Tinto plc; and             
BHP Billiton Limited reserves the right to waive, in whole or in part,          
all or any of the above conditions, except conditions (A) and (K). BHP          
Billiton Limited may waive conditions (L) and (M) only with the prior           
approval of the UK Panel.                                                       
Condition (K) must be fulfilled by, and conditions (B) to (J) (inclusive)       
and (L) to (T) (inclusive) fulfilled or waived by midnight (London time)        
on the 21st day after the later of the first closing date of the Rio            
Tinto plc Offer and the date on which condition (A) is fulfilled (or in         
each such case such later date as BHP Billiton Limited may, with the            
consent of the UK Panel, decide).  BHP Billiton Limited shall be under no       
obligation to waive or treat as satisfied any of the conditions (B) to          
(J) (inclusive) and (L) to (T) (inclusive) by a date earlier than the           
latest date specified above for the satisfaction thereof, notwithstanding       
that the other conditions of the Rio Tinto plc Offer may at such earlier        
date have been waived or fulfilled and that there are at such earlier           
date no circumstances indicating that any of such conditions may not be         
capable of fulfilment.  If BHP Billiton Limited is required by the UK           
Panel to make an offer for Rio Tinto plc Shares under the provisions of         
Rule 9 of the UK Code, BHP Billiton Limited may make such alterations to        
any of the above conditions as are necessary to comply with the                 
provisions of that Rule.                                                        
In the event that Pre-Condition (A) is waived, if the Acquisition               
constitutes a concentration with a community dimension within the scope         
of the Merger Regulation and the European Commission initiates                  
proceedings under Article 6(1)(c) or following a referral by the European       
Commission under Article 9(1) to a competent authority in the United            
Kingdom there is a subsequent reference to the Competition Commission           
before, in each case, 3.00 p.m. (London time) on the first closing date         
of the Rio Tinto plc Offer or the date and time on which the Rio Tinto          
plc Offer becomes unconditional (whichever is the later), the Rio Tinto         
plc Offer will lapse.  If the Rio Tinto plc Offer lapses, the Rio Tinto         
plc Offer will cease to be capable of further acceptance and BHP Billiton       
Limited and accepting Rio Tinto plc Shareholders will cease to be bound         
by acceptances submitted at or before the time when the Rio Tinto plc           
Offer so lapses.                                                                
The Rio Tinto plc Offer will be governed by English law and be subject to       
the jurisdiction of the English courts, to the conditions set out above         
and in the formal Rio Tinto plc Offer Document and related Form of              
Acceptance.                                                                     
2. Certain further terms of the Rio Tinto plc Offer                             
Fractions of New BHP Billiton Limited Shares or Interim Shares will not         
be allotted or issued to persons accepting the Rio Tinto plc Offer.             
Fractional entitlements will be rounded up or down to the nearest whole         
number (with entitlements to 0.5 of a New BHP Billiton Limited Share or         
of an Interim Share being rounded up).                                          
The Rio Tinto plc Offer will not be made, directly or indirectly, in or         
into, or by use of the mails of, or by any means or instrumentality             
(including, without limitation, facsimile transmission, telex, telephone        
or e-mail) of interstate or foreign commerce of, or of any facility of a        
national securities exchange of, Japan or any other jurisdiction where to       
do so would constitute a violation of the laws of that jurisdiction and         
the Rio Tinto plc Offer will not be capable of acceptance by any such           
use, means, instrumentality or facility or from within any such                 
jurisdiction.                                                                   
BHP Billiton Limited reserves the right to deem a shareholder resident in       
such a jurisdiction to have elected for a particular form of                    
consideration, or to have made no election at all, or to offer such             
shareholder cash only by way of consideration, in each case in connection       
with the Rio Tinto plc Offer or any compulsory acquisition procedures.          
BHP Billiton Limited further reserves the right to meet the cash                
consideration due to such shareholders either from its own reserves or by       
arranging, as it thinks fit, the sale or allotment of the shares to which       
such shareholders would otherwise be entitled and then remitting the cash       
proceeds of such sale or allotment, net of expenses, to such shareholders       
instead.                                                                        
The New BHP Billiton Plc Shares will be issued credited as fully paid and       
will rank pari passu in all respects with the existing BHP Billiton Plc         
Shares, save that BHP Billiton Limited reserves the right to withhold any       
dividend not yet paid for the half year ending 31 December 2008 or any          
subsequent period if Rio Tinto plc Shareholders would otherwise receive a       
Rio Tinto dividend and a BHP Billiton dividend for the same period or a         
substantial part of that period.  Applications will be made to the UKLA         
for the New BHP Billiton Plc Shares to be admitted to the Official List         
and to the London Stock Exchange for the New BHP Billiton Plc Shares to         
be admitted to trading.                                                         
In addition, application will be made to the New York Stock Exchange for        
listing of the new BHP Billiton Limited ADRs (representing New BHP              
Billiton Limited Shares) and the new BHP Billiton Plc ADRs (representing        
the New BHP Billiton Plc Shares) being offered in the US Offer.                 
Application will be made for New BHP Billiton Limited Shares to be              
admitted to quotation on ASX. It is expected that admission will become         
effective upon issue and allotment of the New BHP Billiton Limited Shares       
to accepting Rio Tinto shareholders and provision of standard information       
to ASX, and that such New BHP Billiton Limited Shares may be traded on          
ASX as from that time.  The New BHP Billiton Limited Shares will, when          
issued, be fully paid and rank pari passu in all respects with existing         
BHP Billiton Limited Shares, including, where the record date for               
determining entitlements is on or after the date of issue of New BHP            
Billiton Limited Shares, the right to all dividends and other                   
distributions (if any) declared, made or paid by BHP Billiton Limited           
save that BHP Billiton reserves the right to withhold any dividend not          
yet paid for the half year ending 31 December 2008 or any subsequent            
period if Rio Tinto shareholders would otherwise receive a Rio Tinto            
dividend and a BHP Billiton dividend for the same period or a substantial       
part of that period.                                                            
The Rio Tinto plc Shares which will be acquired under the Rio Tinto plc         
Offer will be acquired fully paid and free from all liens, equities,            
charges, encumbrances, options, rights of pre-emption and any other third       
party rights and interests of any nature and together with all rights now       
or hereafter attaching or accruing to them, including voting rights and         
the right to receive and retain in full all dividends and other                 
distributions (if any) declared, made or paid on or after the date of           
this Announcement other than the following dividends if paid or payable         
in cash:                                                                        
* 2007 final dividend (being the final dividend for the year ended 31           
December 2007) at a level which does not exceed US$ 0.832 per share;            
* 2008 interim dividend (being the interim dividend for the six month           
period ending 30 June 2008) at a level which does not exceed US$ 0.676          
per share; and                                                                  
* 2008 final dividend (being the final dividend for the year ended 31           
December 2008) at a level which does not exceed US$ 0.946 per share.            
No BHP Billiton securities will be issued pursuant to the US Offer              
component of the Rio Tinto plc Offer unless and until the Registration          
Statement on Form F-4, which BHP Billiton plans to file with the SEC in         
respect of such US Offer, is declared effective by the SEC.                     
APPENDIX III                                                                    
CONDITIONS AND FURTHER ITEMS OF THE RIO TINTO LIMITED OFFER                     
Conditions to the Rio Tinto Limited Offer                                       
The Rio Tinto Limited Offer, which will be made by BHP Billiton Limited,        
will be made in accordance with Chapter 6 of the Australian Corporations        
Act (as it applies to BHP Billiton).                                            
The Rio Tinto Limited Offer Conditions are identical to the Rio Tinto plc       
Offer Conditions set out in Appendix II except that conditions (L), (N)         
and (T) are omitted (not being conditions to the Rio Tinto Limited Offer)       
and conditions (A), (M) and (O) are replaced with the following:                
Minimum acceptance condition                                                    
(A)   at the time the Rio Tinto Limited Offer has become free of                
conditions (other than this condition (A)), either as a result of the           
conditions being satisfied or the Rio Tinto Limited Offer being declared        
free of the conditions, BHP Billiton Limited having a relevant interest         
in more than 50 per cent of the Publicly-held Rio Tinto Limited Shares on       
issue;                                                                          
Quotation of New BHP Billiton Limited Shares                                    
(M)  permission for the admission to quotation of the New BHP Billiton          
Limited Shares to be issued in connection with the Rio Tinto Limited            
Offer having be granted by ASX, subject only to:                                
(i)  the allotment and issue of such shares; and                                
(ii) the provision of the following information to ASX:                         
(a)  the date of allotment and number of shares for which quotation         
is sought;                                                                      
    (b)  confirmation that the shares have been allocated into the              
issuer sponsored sub register;                                                  
a statement setting out the issued capital of BHP Billiton             
Limited following allotment; and                                                
    (d)  a statement setting out the names of the 20 largest holders of         
BHP Billiton Limited Shares and the percentage held by each;                    
Inter-conditionality of Rio Tinto plc Offer and Rio Tinto Limited Offer         
the Rio Tinto plc Offer having become or having been declared free of all       
Rio Tinto plc Offer Conditions (other than the Rio Tinto Limited Offer          
Defeating Condition);                                                           
Offers will be made under the Rio Tinto Limited Offer subject to                
fulfilment of the Rio Tinto Limited Offer Conditions (if the Pre-               
conditions are satisfied or waived) to each holder of Rio Tinto Limited         
Shares on the Rio Tinto Limited Register Date, and may be extended in BHP       
Billiton Limited`s discretion to any person who becomes registered, or          
entitled to be registered as the holder of Rio Tinto Limited Shares from        
the Rio Tinto Limited Register Date to the end of the Offer Period due to       
conversion of, or exercise of rights attaching to, securities that exist        
on the Register Date and (i) will convert, or may be converted, to Rio          
Tinto Limited Shares or (ii) confer rights to be issued Rio Tinto Limited       
Shares.  Transferees of Rio Tinto Limited Shares will be entitled to            
accept offers as provided under section 653B of the Australian                  
Corporations Act.                                                               
All Rio Tinto Limited Offer Conditions other than Rio Tinto Limited Offer       
Condition (D) will operate as defeating conditions.  Rio Tinto Limited          
Offer Condition (D) will be a condition precedent to provisions of              
contracts resulting from acceptance of offers under the Rio Tinto Limited       
Offer which relate to BHP Billiton acquiring an interest in Rio Tinto           
Limited Shares becoming binding.  Any breach or non-fulfilment of a Rio         
Tinto Limited Offer Condition may be relied upon only by BHP Billiton           
Limited which may waive (generally or in respect of a particular event)         
the breach or non-fulfilment of that condition.                                 
BHP Billiton Limited will not declare the Rio Tinto Limited Offer free of       
condition (O) unless it has been satisfied.                                     
Under section 625 of the Australian Corporations Act, the Rio Tinto             
Limited Offer is also subject to a non-waivable condition (subject to any       
modification by ASIC) that an application for admission of the New BHP          
Billiton Limited Shares to quotation on ASX be made within 7 days after         
the date on which the BHP Billiton Bidder`s Statement is served on Rio          
Tinto Limited and that permission for admission to quotation of those           
shares on ASX be granted no later than 7 days after the end of the Rio          
Tinto Limited Offer Period.                                                     
In accordance with the Australian Corporations Act, BHP Billiton Limited        
will be entitled to declare the Rio Tinto Limited Offer free of any of          
the Rio Tinto Limited Offer Conditions not less than 7 days before the          
last day of the Rio Tinto Limited Offer Period.  However, BHP Billiton          
Limited will not declare the offers free of Rio Tinto Limited Offer             
Condition (D) if to do so would result in a contravention of the                
Australian FATA.                                                                
The offers to be made pursuant to Rio Tinto Limited Offer will be               
governed by the law in force in the State of Victoria, Australia.               
Certain further terms of the Rio Tinto Limited Offer                            
Fractions of New BHP Billiton Limited Shares will not be allotted or            
issued to persons accepting the Offer.  Fractional entitlements will be         
rounded up or down to the nearest whole number (with entitlements to 0.5        
of a New BHP Billiton Limited Share being rounded up).                          
The Rio Tinto Limited Offer will not be registered in any jurisdiction          
outside Australia (unless an applicable foreign law treats it as                
registered as a result of the BHP Billiton Bidder`s Statement being             
lodged with ASIC).  Any shareholder who wishes to accept the Rio Tinto          
Limited Offer must first satisfy itself that such acceptance is permitted       
by any foreign law applicable to that shareholder.  If any authority or         
clearance under Australian law is required to enable a shareholder in Rio       
Tinto Limited to receive any consideration under the Rio Tinto Limited          
Offer, any acceptance of the Rio Tinto Limited Offer will not create any        
right to receive that consideration unless and until all requisite              
authorities or clearances have been received.  The Rio Tinto Limited            
Offer may provide that securities which would otherwise be issued to an         
accepting shareholder resident in a jurisdiction outside Australia may be       
vested in a nominee and sold, with the net proceeds of sale remitted to         
the accepting shareholder.                                                      
The New BHP Billiton Limited Shares to be issued pursuant to the Rio            
Tinto Limited Offer have not been and will not be registered under any of       
the relevant securities laws of Japan.  Accordingly, the New BHP Billiton       
Limited Shares may not be offered, sold or delivered, directly or               
indirectly, in Japan, except pursuant to exemptions from applicable             
requirements of such jurisdiction.                                              
Application will be made for New BHP Billiton Limited Shares to be              
admitted to quotation on ASX. It is expected that admission will become         
effective upon issue and allotment of the New BHP Billiton Limited Shares       
to accepting Rio Tinto shareholders and provision of standard information       
to ASX, and that such New BHP Billiton Limited Shares may be traded on          
ASX as from that time.  The New BHP Billiton Limited Shares will, when          
issued, be fully paid and rank pari passu in all respects with existing         
BHP Billiton Limited Shares, including, where the record date for               
determining entitlements is on or after the date of issue of New BHP            
Billiton Limited Shares, the right to all dividends and other                   
distributions (if any) declared, made or paid by BHP Billiton Limited           
save that BHP Billiton reserves the right to withhold any dividend not          
yet paid for the half year ending 31 December 2008 or any subsequent            
period if Rio Tinto shareholders would otherwise receive a Rio Tinto            
dividend and a BHP Billiton dividend for the same period or a substantial       
part of that period.                                                            
Rio Tinto Limited Shares which will be acquired under the Rio Tinto             
Limited Offer will be acquired fully paid and free from all liens,              
equities, charges, encumbrances, options, rights of pre-emption and any         
other third party rights and interests of any nature and together with          
all rights now or hereafter attaching or accruing to them, including            
voting rights and the right to receive and retain in full all dividends         
and other distributions (if any) declared, made or paid on or after the         
Announcement Date other than the following dividends if paid or payable         
in cash:                                                                        
* 2007 final dividend (being the final dividend for the year ended 31           
December 2007) at a level which does not exceed US$ 0.832 per share;            
* 2008 interim dividend (being the interim dividend for the six month           
period ending 30 June 2008) at a level which does not exceed US$ 0.676          
per share; and                                                                  
* 2008 final dividend (being the final dividend for the year ended 31           
December 2008) at a level which does not exceed US$ 0.946 per share.            
APPENDIX IV                                                                     
BASES AND SOURCES OF INFORMATION                                                
(a) Unless otherwise stated, financial and other information concerning         
BHP Billiton and Rio Tinto has been extracted or derived from the interim       
statements, preliminary results and the annual report and accounts of           
each company for the relevant periods, or from published sources or from        
BHP Billiton management sources.                                                
(b) Unless otherwise stated, average share prices and market                    
capitalisations throughout this Announcement reflect volume-weighted            
averages.                                                                       
(c) The market value of BHP Billiton Limited Shares is based on the             
closing price of a BHP Billiton Limited Share of A$46.10, provided by the       
ASX on 31 October 2007, being the last date prior to BHP Billiton`s             
approach to Rio Tinto.                                                          
(d) The market value of BHP Billiton Plc Shares is based on the closing         
middle-market price of a BHP Billiton Plc Share of ?18.31, provided by          
the London Stock Exchange on 31 October 2007, being the last date prior         
to BHP Billiton`s approach to Rio Tinto.                                        
(e) The volume weighted average closing share price over the calendar           
month ended 31 October 2007, being the last date prior to BHP Billiton`s        
approach to Rio Tinto, is A$45.77 for BHP Billiton Limited and ?17.99 for       
BHP Billiton Plc.                                                               
(f) The market value of BHP Billiton Limited Shares is based on the             
closing price of a BHP Billiton Limited Share of A$39.32, provided by the       
ASX on 4 February 2008, being the last practicable date prior to this           
Announcement.                                                                   
(g) The market value of BHP Billiton Plc Shares is based on the closing         
price of a BHP Billiton Plc Share of ?16.49, provided by the London Stock       
Exchange on 4 February 2008, being the last practicable date prior to           
this Announcement.                                                              
(h) As at 4 February 2008 (being the last practicable date prior to this        
Announcement) there were 2,232,522,894 BHP Billiton Plc Shares (including       
25,515,350 BHP Billiton Plc Shares held by BHP Billiton Limited) and            
3,358,359,496 BHP Billiton Limited Shares in issue.                             
(i) The market value of Rio Tinto Limited Shares is based on the closing        
price of a Rio Tinto Limited Share of A$110.00, provided by the ASX on 31       
October 2007, being the last date prior to BHP Billiton`s approach to Rio       
Tinto.                                                                          
(j) The market value of Rio Tinto plc Shares is based on the closing            
middle-market price of a Rio Tinto plc Share of ?44.90, provided by the         
London Stock Exchange on 31 October 2007, being the last date prior to          
BHP Billiton`s approach to Rio Tinto.                                           
(k) The volume weighted average closing share price over the calendar           
month ended 31 October 2007, being the last date prior to BHP Billiton`s        
approach to Rio Tinto is A$109.20 for Rio Tinto Limited and ?43.09 for          
Rio Tinto plc.                                                                  
(l) The market value of Rio Tinto Limited shares is based on the closing        
price of a Rio Tinto Limited share of A$128.11, provided by the ASX on 4        
February 2008, being the last practicable date prior to this                    
Announcement.                                                                   
(m) The market value of Rio Tinto plc Shares is based on the closing            
middle-market price of a Rio Tinto plc Share of ?55.27, provided by the         
London Stock Exchange on 4 February 2008, being the last practicable date       
prior to this Announcement.                                                     
(n) As at 4 February 2008 (being the last practicable date prior to this        
Announcement) there were 456,815,943 Rio Tinto Limited Shares and               
997,542,790 Rio Tinto plc Shares in issue. Rio Tinto plc, through Tinto         
Holdings Australia Pty Limited, holds 171,072,520 shares in Rio Tinto           
Limited.                                                                        
(o) All references to the share capital or market capitalisation of Rio         
Tinto Limited refer to the publicly traded shares, or free float, of Rio        
Tinto Limited, which excludes the Rio Tinto Limited Shares held by a            
wholly-owned subsidiary of Rio Tinto plc.                                       
(p) All references to the share capital or market capitalisation of BHP         
Billiton exclude shares held as treasury shares, shares currently held by       
BHP Billiton Limited in BHP Billiton Plc and not yet cancelled and, in          
relation to the Enlarged Group, any intra-DLC cross-holdings.                   
(q) The exchange rate of 2.077 US$/? and 0.927 US$/A$ on 31 October 2007.       
(r) The exchange rate of 1.976 US$/? and 0.910 US$/A$ on 4 February 2008.       
(s) All reference to nominal figures assume an inflation rate of 2.5 per        
cent.                                                                           
(t) In arriving at the estimate of cost savings and volume-driven               
benefits, the Board of BHP Billiton has assumed the following:                  
- that, following completion, BHP Billiton acquires 100% of the shares in       
Rio Tinto Limited and Rio Tinto plc without undue delay;                        
- that there will be no significant impact on the combined group arising        
from any decisions made by competition authorities;                             
- that there will be no material change to the market dynamics in the           
combined core markets following completion. In particular, BHP Billiton         
has based these estimates on its understanding of current and future            
market supply, demand and pricing levels; and                                   
- there will be no material change to the relative exchange rates in the        
combined core markets and geographies following completion.                     
(u) In arriving at the estimate of cost savings and volume-driven               
benefits, the Board of BHP Billiton has assumed that there are comparable       
operations, processes and procedures within Rio Tinto, except where             
publicly available information clearly indicates otherwise. BHP                 
Billiton`s management, through a detailed understanding of BHP Billiton`s       
cost structure, has determined the source and scale of realisable cost          
savings. The one-off implementation cash costs of achieving the cost            
savings and volume-driven benefits represents those costs which are             
incremental to BHP Billiton`s existing plans.  In addition to BHP               
Billiton management`s information, the sources of information that BHP          
Billiton has used to arrive at the estimate of cost savings include:            
- Rio Tinto`s annual report and accounts;                                       
- Rio Tinto`s presentations to analysts;                                        
- Rio Tinto`s website;                                                          
- Documents and statements issued by Rio Tinto in connection with its           
acquisition of Alcan;                                                           
- Analysts` research;                                                           
- Other public information; and                                                 
- BHP Billiton`s knowledge of the industry and of Rio Tinto.                    
(v) The Board of BHP Billiton has not had discussions with Rio Tinto`s          
management regarding the reasonableness of their assumptions supporting         
the estimate of cost savings and volume-driven benefits. Therefore, there       
remains an inherent risk in this forward-looking estimate.                      
(w) Due to the scale of a combined BHP Billiton and Rio Tinto                   
organisation, there may be additional changes to the combined group`s           
operations. In addition, there are several material assumptions                 
underlying the estimate, including the allocation of costs within Rio           
Tinto, the relative proportion of volume-sensitive costs for both BHP           
Billiton and Rio Tinto and the level of costs necessary to operate              
effectively each combined function or activity. A detailed sensitivity          
analysis was conducted to establish the robustness of the estimates to a        
number of changes in the assumptions in addition to contingencies               
factored in by management. Because of these factors and the fact that the       
changes relate to the future, the resulting cost savings and volume-            
driven benefits may be materially greater or less than those estimated.         
APPENDIX V                                                                      
REPORT ON ESTIMATED COST SAVINGS AND VOLUME-DRIVEN BENEFITS                     
The following are the texts of letters from KPMG and from Goldman Sachs         
International relating to the BHP Billiton statement of estimated costs         
savings and volume-driven benefits set out in this Announcement:                
(a) from KPMG Audit Plc                                                         
KPMG Audit Plc                                                                  
8 Salisbury Square                                                              
London EC4Y 8BB                                                                 
United Kingdom                                                                  
The Directors                                                                   
BHP Billiton Limited                                                            
180 Lonsdale Street                                                             
Melbourne Vic 3000                                                              
The Directors                                                                   
BHP Billiton Plc                                                                
Neathouse Place                                                                 
London SW1V 1BH                                                                 
Goldman Sachs International                                                     
Peterborough Court                                                              
133 Fleet Street                                                                
London EC4A 2BB                                                                 
5 February 2008, London                                                         
Dear Sirs                                                                       
BHP BILLITON OFFER FOR RIO TINTO                                                
We refer to the statement made by the directors of BHP Billiton Limited         
and BHP Billiton Plc (`the Directors`) on page 15 of this document (`the        
Statement`) to the effect that:                                                 
".BHP Billiton expects:                                                         
- US$1.7 billion nominal per annum of cost savings in the third full year       
following completion, achieved through removal of duplication as well as        
procurement and operating efficiency savings; and                               
- Further EBITDA enhancement of US$2.0 billion nominal per annum in the         
seventh full year following completion, driven primarily by the                 
acceleration of volumes to customers.                                           
In the seventh full year following completion this, therefore, is               
expected to result in a total incremental EBITDA of US$3.7 billion              
nominal per annum of quantified synergies.                                      
The total one-off implementation cash costs related to achieving these          
synergies are expected to amount to US$0.65 billion over the first two          
years following completion."                                                    
The Statement has been made in the context of the disclosures in notes          
(s) to (w) of Appendix IV setting out, inter alia, the basis of the             
Directors` belief (including sources of information) supporting the             
Statement and their analysis and explanation of the underlying                  
constituent elements.                                                           
This report is required by Note 8(b) to Rule 19.1 of the City Code on           
Takeovers and Mergers (`the City Code`) and is given for the purpose of         
complying with that requirement and for no other purpose.                       
Responsibility                                                                  
The Statement is the responsibility solely of the Directors.  It is our         
responsibility and that of Goldman Sachs International to form respective       
opinions, as required by Note 8(b) to Rule 19.1 of the City Code as to          
whether the Statement has been made by the Directors with due care and          
consideration.                                                                  
Save for any responsibility which we may have to those persons to whom          
this report is expressly addressed, to the fullest extent permitted by          
law we do not assume any responsibility and will not accept any liability       
to any other person for any loss suffered by any such other person as a         
result of, arising out of, or in connection with this report.                   
Basis of opinion                                                                
We have discussed the Statement, together with the underlying plans, with       
the Directors and with Goldman Sachs International.  We have also               
considered the letter dated 5 February 2008 from Goldman Sachs                  
International to the Directors on the same matter.  We conducted our work       
in accordance with Standards for Investment Reporting issued by the             
Auditing Practices Board of the United Kingdom.                                 
We do not express any opinion as to the achievability of the benefits           
identified by the Directors in the Statement.  The Statement is subject         
to uncertainty as described in this document.  Because of the significant       
changes in the enlarged group`s operations expected to flow from the            
acquisition and because the Statement relates to the future, the actual         
benefits achieved are likely to be different from those anticipated in          
the Statement and the differences may be material.                              
Opinion                                                                         
On the basis of the foregoing, we report that in our opinion the                
Directors have made the Statement, in the form and context in which it is       
made, with due care and consideration.                                          
Yours faithfully                                                                
KPMG Audit Plc                                                                  
(b) from Goldman Sachs International                                            
Goldman Sachs International                                                     
Peterborough Court                                                              
133 Fleet Street                                                                
London EC4A 2BB                                                                 
The Directors                                                                   
BHP Billiton Limited                                                            
180 Lonsdale Street                                                             
Melbourne Vic 3000                                                              
The Directors                                                                   
BHP Billiton Plc                                                                
Neathouse Place                                                                 
London SW1V 1BH                                                                 
5 February 2008                                                                 
Dear Sirs                                                                       
BHP BILLITON OFFER FOR RIO TINTO                                                
We refer to the statement of estimated cost savings and volume-driven           
benefits, the bases of preparation thereof and the notes thereto                
(together the "Statement") made by BHP Billiton Limited and BHP Billiton        
Plc ("BHP Billiton") set out in this document, for which the Directors of       
BHP Billiton are solely responsible.                                            
We have discussed the Statement (including the assumptions and sources of       
information referred to therein), with the Directors of BHP Billiton and        
those officers and employees of BHP Billiton who developed the underlying       
plans.  The Statement is subject to uncertainty as described in this            
document and our work did not involve an independent examination of any         
of the financial or other information underlying the Statement.                 
We have relied upon the accuracy and completeness of all the financial          
and other information reviewed by us and have assumed such accuracy and         
completeness for the purposes of rendering this letter. We have also            
reviewed the work carried out by KPMG and have discussed with them the          
conclusions stated in their letter of 5 February 2008 addressed to              
yourselves and ourselves on this matter.                                        
We do not express any opinion as to the achievability of the cost savings       
and estimated volume-driven benefits identified by the Directors of BHP         
Billiton.                                                                       
This letter is provided pursuant to our engagement letter with BHP              
Billiton solely to the Directors of BHP Billiton in connection with Note        
8 (b) of Rule 19.1 of the City Code on Takeovers and Mergers and for no         
other purpose. We accept no responsibility to Rio Tinto or its                  
shareholders or any other person other than the Directors of BHP Billiton       
in respect of the contents of, or any matter arising out of or in               
connection with, this letter.                                                   
On the basis of the foregoing, we consider that the Statement by BHP            
Billiton, for which the Directors of BHP Billiton are solely responsible,       
has been made with due care and consideration in the context in which it        
was made.                                                                       
Yours faithfully                                                                
Simon Dingemans                                                                 
Managing Director                                                               
For and on behalf of                                                            
Goldman Sachs International                                                     
APPENDIX VI                                                                     
DEFINITIONS                                                                     
"ACCC"                    Australian Competition and Consumer                   
Commission;                                            
"Acquisition"             the proposed acquisition by BHP                       
                         Billiton Limited of all of the                         
                         shares in Rio Tinto plc and all of                     
the shares in Rio Tinto Limited                        
                         pursuant to the terms (as varied)                      
                         set out in this Announcement by                        
                         means of the Rio Tinto plc Offer                       
and the Rio Tinto Limited Offer                        
                         respectively;                                          
"Announcement"            this announcement;                                    
"Announcement Date"       the time of announcement of the                       
Offers, being:                                         
                         9.30pm London time on 5 February                       
                         2008; and                                              
                         8.30am Melbourne time on 6 February                    
2008;                                                  
"Approval"                a licence, authority, consent,                        
                         permission, approval, order,                           
                         clearance, exemption, agreement,                       
recognition, grant, confirmation,                      
                         waiver, ruling, determination or                       
                         decision;                                              
"ASIC"                    the Australian Securities and                         
Investments Commission;                                
"ASX"                     ASX Limited or the stock exchange                     
                         conducted by ASX Limited, as the                       
                         context requires;                                      
"Australia"               the Commonwealth of Australia, its                    
                         states, territories and                                
                         possessions;                                           
"Australian               the Corporations Act 2001 (Cth);                      
Corporations Act"                                                               
"Australian Trade         the Australian Trade Practices Act                    
Practices Act"            1974 (Cth);                                           
"BHP Billiton"            the DLC comprising two listed                         
parent entities - BHP Billiton Plc                     
                         and BHP Billiton Limited;                              
"BHP Billiton Bidder`s    the document to be sent to Rio                        
Statement"                Tinto Limited Shareholders pursuant                   
to Chapter 6 of the Australian                         
                         Corporations Act which will                            
                         contain, among other things, the                       
                         form of offer for the Rio Tinto                        
Limited Offer;                                         
"BHP Billiton EGMs"       the extraordinary general meetings                    
                         of BHP Billiton Plc shareholders                       
                         and BHP Billiton Limited                               
shareholders as may be convened for                    
                         the purposes of considering, and if                    
                         thought fit, approving the BHP                         
                         Billiton Shareholder Resolutions;                      
"BHP Billiton Group"      BHP Billiton Limited, BHP Billiton                    
                         Plc and their respective controlled                    
                         entities;                                              
"BHP Billiton Limited     the American depository receipts                      
ADRs"                     evidencing BHP Billiton Limited                       
                         American Depository Shares each                        
                         representing two BHP Billiton                          
                         Limited Shares;                                        
"BHP Billiton Limited     the ordinary shares in the share                      
Shares"                   capital of BHP Billiton Limited;                      
"BHP Billiton Plc ADRs"   the American depository receipts                      
                         evidencing BHP Billiton Plc                            
American Depository Shares each                        
                         representing two BHP Billiton Plc                      
                         Shares;                                                
"BHP Billiton Plc         ordinary shares of US$0.50 each in                    
Shares"                   the share capital of BHP Billiton                     
                         Plc;                                                   
"BHP Billiton             the document to be sent with the                      
Prospectus"               Rio Tinto plc Offer Document to Rio                   
Tinto plc Shareholders constituting                    
                         a prospectus for the purpose of the                    
                         Financial Services and Markets Act                     
                         2000 in relation to the New BHP                        
Billiton Limited Shares and the New                    
                         BHP Billiton Plc Shares;                               
"BHP Billiton             such resolutions as are necessary                     
Shareholder               by the shareholders of BHP Billiton                   
Resolutions"              Plc and BHP Billiton Limited to                       
                         approve, implement and effect the                      
                         Rio Tinto plc Offer and the Rio                        
                         Tinto Limited Offer and the                            
acquisition of the Rio Tinto plc                       
                         Shares and the Rio Tinto Limited                       
                         Shares including resolutions to                        
                         increase the share capital of BHP                      
Billiton Plc and to authorise the                      
                         creation and allotment of the New                      
                         BHP Billiton Plc Shares and permit                     
                         the acquisition of the Interim                         
Shares by BHP Billiton Plc;                            
"Canadian Commissioner"   the Commissioner of Competition                       
                         appointed pursuant to Section 7 of                     
                         the Competition Act;                                   
"Canadian Competition     the Competition Act (Canada),                         
Act"                      R.S.C. 1985, c. C-34 (as amended);                    
"Constitution"            in relation to a company, means the                   
                         constitution, or memorandum and                        
articles of association, or other                      
                         constituent document of, the                           
                         company;                                               
"DLC"                     A dual-listed company;                                
"EBITDA"                  earnings before interest, taxes,                      
                         depreciation and amortisation;                         
"Enlarged Group"          the BHP Billiton Group following                      
                         completion of the Acquisition;                         
"Exchange Act"            US Securities Exchange Act of 1934                    
                         (as amended);                                          
"FATA"                    the Foreign Acquisitions and                          
                         Takeovers Act 1975 (Cth);                              
"Interim Shares"          the securities to be issued by BHP                    
                         Billiton Limited to holders of Rio                     
                         Tinto plc Shares pursuant to the                       
                         Rio Tinto plc Offer, which                             
securities will immediately be                         
                         exchanged for New BHP Billiton Plc                     
                         Shares;                                                
"Iron Ore Assets"         the iron ore mining rights, mining                    
tenements, leases, licences or                         
                         other interests in any form                            
                         including, but not limited to:                         
                         (a)  any right, title or interest                      
held pursuant to any State                             
                         Agreement or the Mining Act or                         
                         under any pending State Agreement                      
                         or the Mining Act or any approved                      
or pending proposals under any such                    
                         State Agreement or the Mining Act;                     
                         (b)  Any right title or interest                       
                         held pursuant to any Joint Venture                     
Agreement  or under any other                          
                         pending Joint Venture Agreement and                    
                         approved or pending proposals under                    
                         any such Joint Venture Agreement;                      
(c) trademarks, brands, copyright                      
                         or marketing tools or intellectual                     
                         property and technology;                               
                         (d)  any rights under contracts for                    
the sale of iron ore products from                     
                         Western Australia,                                     
                         owned, operated, controlled or held                    
                         by any member of the Rio Tinto                         
Group and any other assets owned,                      
                         operated or controlled by any                          
                         member of the Rio Tinto Group in                       
                         connection with its Iron Ore                           
Business, including, but not                           
                         limited to:                                            
                         (a)  the Rio Tinto Group`s interest                    
                         in the Robe River joint venture,                       
including in the mines, rail and                       
                         port facilities controlled or                          
                         operated by or pursuant to the Robe                    
                         River joint venture;                                   
(b)  the mines, rail and port                          
                         facilities owned or operated by                        
                         Hamersley Iron;                                        
                         (c)  the Rio Tinto Group`s interest                    
in the Hope Downs joint venture,                       
                         including in the mines, rail and                       
                         port facilities controlled or                          
                         operated by or pursuant to the Hope                    
Downs joint venture;                                   
                         (d)  the mines, rail and port                          
                         facilities owned or operated by                        
                         Pilbara Iron;                                          
(e)  the Rio Tinto Group`s interest                    
                         in the Rhodes Ridge joint venture,                     
                         including in the mines, rail and                       
                         port facilities controlled or                          
operated by or pursuant to the                         
                         Rhodes Ridge joint venture;                            
                         (f)  the mines, rail and port                          
                         facilities at Corumb?, Paraguay;                       
(g)  the Rio Tinto Group`s interest                    
                         in the Rio Tinto Orissa Mining                         
                         joint venture, including the                           
                         studies, the iron ore leases and                       
other property held by the Rio                         
                         Tinto Orissa Mining joint venture;                     
                         (h)  the assets including studies                      
                         and property relating to the                           
Simandou project in West Guinea;                       
                         (i)  the Rio Tinto Group`s interest                    
                         in the Channar joint venture,                          
                         including in the mines, rail and                       
port facilities controlled or                          
                         operated by or pursuant to the                         
                         Channar joint venture; and                             
                         (j)  the Rio Tinto Group`s interest                    
in the Eastern Range joint venture,                    
                         including in the mines, rail and                       
                         port facilities controlled or                          
                         operated by or pursuant to the                         
Eastern Range  joint venture;                          
"Iron Ore Business"       the production or sale of iron ore                    
                         products using the Iron Ore Assets;                    
"Joint Venture            any agreement pursuant to which any                   
Agreement"                member of the Rio Tinto Group holds                   
                         an interest in any joint venture                       
                         entity, whether a company,                             
                         unincorporated firm, undertaking,                      
joint venture, association,                            
                         partnership or any other entity;                       
"London Stock Exchange"   the London Stock Exchange Plc;                        
"Material Rio Tinto       any agreement, arrangement,                           
Agreement"                licence, permit or other instrument                   
                         that is material in the context of                     
                         the business of the Rio Tinto Group                    
                         and to which any member of the Rio                     
Tinto Group is a party or by which                     
                         any such member or any of its                          
                         assets may be bound, entitled or                       
                         subject.  An agreement,                                
arrangement, licence, permit or                        
                         other instrument is taken to be                        
                         material in the context of the                         
                         business of the Rio Tinto Group if                     
the termination of it would or                         
                         would be likely to materially                          
                         adversely affect the value of the                      
                         long-term revenues or costs or the                     
assets or liabilities of the Rio                       
                         Tinto Group;                                           
"Material Rio Tinto        (a) any business, asset (including                   
Asset"                    shares or other securities) or                        
property of any member of the Rio                      
                         Tinto Group which is material in                       
                         the context of the business of the                     
                         Rio Tinto Group; or                                    
(b) any Iron Ore Asset that is                        
                         material in the context of the Iron                    
                         Ore Business.                                          
                         For the avoidance of doubt, a                          
reference in paragraph (a) above to                    
                         assets includes (without                               
                         limitation) Iron Ore Assets;                           
"Mining Act"              the Mining Act 1978 (Western                          
Australia);                                            
"Mix and Match            the mix and match facility as                         
Facility"                 described in paragraph 2 of this                      
                         Announcement;                                          
"New BHP Billiton         the BHP Billiton Limited Shares to                    
Limited Shares"           be issued pursuant to the Rio Tinto                   
                         plc Offer or the Rio Tinto Limited                     
                         Offer;                                                 
"New BHP Billiton Plc     the BHP Billiton Plc Shares to be                     
Shares"                   issued pursuant to the Rio Tinto                      
                         plc Offer;                                             
"Offers"                  the Rio Tinto Limited Offer and the                   
Rio Tinto plc Offer;                                   
"Pre-conditions"          the pre-conditions to the posting                     
                         of the Rio Tinto plc Offer Document                    
                         and related Rio Tinto plc Offer                        
Form of Acceptance and the BHP                         
                         Billiton Bidder`s Statement and                        
                         related Rio Tinto Limited Offer                        
                         Form of Acceptance which are set                       
out in Appendix I to this                              
                         Announcement and "Pre-condition"                       
                         means any of them;                                     
"Public Authority"        any government or any governmental,                   
semi-governmental, administrative,                     
                         trade, regulatory, statutory or                        
                         judicial entity, tribunal,                             
                         authority, agency or association,                      
whether in Australia or elsewhere,                     
                         including the ACCC. It also                            
                         includes any governor, governor-in-                    
                         council, minister of state or other                    
government official and any self-                      
                         regulatory organisation established                    
                         under statute or any stock                             
                         exchange.  However, when used in                       
Condition (I), it does not include                     
                         the Australian Takeovers Panel,                        
                         ASIC or any court that hears or                        
                         determines proceedings under                           
section 657G of the Australian                         
                         Corporations Act or proceedings                        
                         commenced by a person specified in                     
                         section 659B(1) of the Australian                      
Corporations Act in relation to the                    
                         Acquisition;                                           
"Publicly-held Rio        the Rio Tinto Limited Shares the                      
Tinto Limited Shares"     beneficial owners of which are not                    
Rio Tinto plc or a subsidiary of                       
                         Rio Tinto plc, where subsidiary has                    
                         the meaning ascribed to that term                      
                         in section 736 of the Companies Act                    
1985 (United Kingdom) as at the                        
                         date of adoption of the                                
                         constitution of Rio Tinto Limited,                     
                         being 24 May 2000;                                     
"Regulatory Information   the Company Announcements Office                      
Service"                  and/or the RNS provided by the                        
                         London Stock Exchange and/or any                       
                         other channel recognised from time                     
to time as a channel for the                           
                         dissemination of regulatory                            
                         information by listed companies                        
                         under the UK Listing Rules;                            
"Relevant Acquisition"    an acquisition of:                                    
                         (a) Rio Tinto plc Shares by BHP                        
                         Billiton Limited;                                      
                         (b) Rio Tinto Limited Shares by BHP                    
Billiton Limited;                                      
                         (c) Interim Shares by BHP Billiton                     
                         Plc; or                                                
                         (d) BHP Billiton Limited Shares                        
issued as consideration for the                        
                         acquisition of the Rio Tinto                           
                         Limited Shares that were held by                       
                         Tinto Holdings Australia Pty Ltd or                    
a member of the Rio Tinto Group;                       
"Relevant Period"         the period commencing on the                          
                         Announcement Date and ending at the                    
                         end of:                                                
(a)  with respect to the Rio Tinto                     
                         plc Offer, the Rio Tinto plc Offer                     
                         Period; and                                            
                         (b)  with respect to Rio Tinto                         
Limited, the Rio Tinto Limited                         
                         Offer Period;                                          
"Rio Tinto"               the DLC comprising two listed                         
                         entities - Rio Tinto plc and Rio                       
Tinto Limited;                                         
"Rio Tinto DLC            the agreements and documents                          
Agreements"               constituting the Rio Tinto DLC                        
                         including the DLC Merger Sharing                       
Agreement between Rio Tinto plc and                    
                         Rio Tinto Limited, the RTZ                             
                         Shareholder Voting Agreement and                       
                         the CRA Shareholder Voting                             
Agreement between, among others,                       
                         Rio Tinto plc, Rio Tinto Limited                       
                         and Law Debenture Trust Corporation                    
                         plc, and certain Trust Deeds and                       
Deed Polls, each dated on or about                     
                         21 December 1995 (as amended at the                    
                         Announcement Date);                                    
"Rio Tinto Group"         Rio Tinto Limited, Rio Tinto plc                      
and their respective controlled                        
                         entities;                                              
"Rio Tinto Limited        the holding of approximately 37% of                   
Cross-holding"            Rio Tinto Limited Shares held by                      
Tinto Holdings Australia Pty Ltd, a                    
                         wholly owned subsidiary of Rio                         
                         Tinto plc;                                             
"Rio Tinto Limited        the takeover bid to be made by BHP                    
Offer"                    Billiton Limited for Rio Tinto                        
                         Limited Shares once the Pre-                           
                         conditions have been satisfied or                      
                         waived (as varied or extended);                        
"Rio Tinto Limited        the conditions of the Rio Tinto                       
Offer Conditions"         Limited Offer described in Appendix                   
                         III to this Announcement;                              
"Rio Tinto Limited        the Rio Tinto plc Offer Condition                     
Offer Defeating           which relates to the fulfilment or                    
Condition"                waiver of the Rio Tinto Limited                       
                         Offer Conditions, being                                
                         paragraph (O) of the Rio Tinto plc                     
Offer Conditions;                                      
"Rio Tinto Limited        the form of acceptance and                            
Offer Form of             authority relating to the Rio Tinto                   
Acceptance"               Limited Offer accompanying the BHP                    
Billiton Bidder`s Statement;                           
"Rio Tinto Limited        the period during which the Rio                       
Offer Period"             Tinto Limited Offer is open for                       
                         acceptance;                                            
"Rio Tinto Limited        the date set by BHP Billiton                          
Register Date"            Limited under section 633(2) of the                   
                         Australian Corporations Act (as it                     
                         applies to Rio Tinto Limited);                         
"Rio Tinto Limited        fully paid ordinary shares in the                     
Shares"                   capital of Rio Tinto Limited being                    
                         shares which exist at the Rio Tinto                    
                         Limited Register Date or come into                     
existence during the Rio Tinto                         
                         Limited Offer Period as a result of                    
                         the conversion of, or exercise of                      
                         rights attached to, options or                         
other securities issued under the                      
                         Rio Tinto Limited Share Schemes                        
                         being options or securities in                         
                         existence at the Rio Tinto Limited                     
Register Date;                                         
"Rio Tinto Limited        the Rio Tinto Limited Share Option                    
Share Schemes"            Plan, Rio Tinto Limited Share                         
                         Savings Plan and Rio Tinto Limited                     
Mining Companies Comparative Plan;                     
"Rio Tinto Limited        the holders of Rio Tinto Limited                      
Shareholders"             Shares;                                               
"Rio Tinto plc ADRs"      the American depository receipts                      
evidencing Rio Tinto plc American                      
                         Depository Shares each representing                    
                         four Rio Tinto plc Shares;                             
"Rio Tinto plc Offer"     the offer for Rio Tinto plc Shares,                   
including the US Offer, to be made                     
                         by BHP Billiton Limited once the                       
                         Pre-conditions have been satisfied                     
                         or waived, in the terms and                            
conditions set out in Appendix II                      
                         of this Announcement and to be set                     
                         out in the Rio Tinto plc Offer                         
                         Document and the Registration                          
Statement on Form F-4 including,                       
                         where the context so requires, any                     
                         subsequent revision, variation,                        
                         extension or renewal of the Rio                        
Tinto plc Offer;                                       
"Rio Tinto plc Offer      the conditions of the  Rio Tinto                      
Conditions"               plc Offer set out in Appendix II to                   
                         this Announcement;                                     
"Rio Tinto plc Offer      the Rio Tinto Limited Offer                           
Defeating Condition"      Condition which relates   to the                      
                         fulfilment or waiver of the Rio                        
                         Tinto plc Offer Conditions, being                      
paragraph (O) of the Rio Tinto                         
                         Limited Offer Conditions;                              
"Rio Tinto plc Offer      the document to be sent to Rio                        
Document"                 Tinto plc Shareholders once the Pre-                  
conditions have been satisfied or                      
                         waived, containing and setting out                     
                         the full terms and conditions of                       
                         the Rio Tinto plc Offer;                               
"Rio Tinto plc Offer      the form of acceptance and                            
Form of Acceptance"       authority relating to the Rio Tinto                   
                         plc Offer accompanying the Rio                         
                         Tinto plc Offer Document;                              
"Rio Tinto plc Offer      the period during which offers made                   
Period"                   under the Rio Tinto plc Offer are                     
                         open for acceptance;                                   
"Rio Tinto plc            the holders of Rio Tinto plc                          
Shareholders"             Shares;                                               
"Rio Tinto plc Shares"    the existing unconditionally                          
                         allotted or issued and fully paid                      
                         (or credited as fully paid)                            
ordinary shares of 10p each in the                     
                         capital of Rio Tinto plc and any                       
                         further such shares which are                          
                         unconditionally allotted or issued                     
on or prior to the date on which                       
                         the Rio Tinto plc Offer closes or,                     
                         subject to the provisions of the UK                    
                         Code, such earlier date or dates as                    
BHP Billiton Limited may decide;                       
"Rio Tinto plc Share      the Rio Tinto plc Share Option                        
Schemes"                  Plan, Rio Tinto plc Share Savings                     
                         Plan, Rio Tinto plc Mining                             
Companies Comparative Plan, Rio                        
                         Tinto Management Share Plan and Rio                    
                         Tinto plc Share Ownership Plan;                        
"SEC"                     United States Securities and                          
Exchange Commission;                                   
"Securities Act"          US Securities Act of 1933, as                         
                         amended;                                               
"Share Sale Facility"     the share sale facility described                     
in paragraph 15 of this                                
                         Announcement;                                          
"South African            South African Competition Act, 89                     
Competition Act"          of 1998, as amended;                                  
"State Agreement"         any Government agreement pursuant                     
                         to the Government Agreements Act                       
                         1979 (Western Australia);                              
"UK Code"                 The City Code on Takeovers and                        
Mergers;                                               
"UK Companies Act 2006"   the Companies Act 2006 (UK);                          
"UKLA" or "UK Listing     the Financial Services Authority                      
Authority"                acting in its capacity as the                         
competent authority for the                            
                         purposes of Part VI of the                             
                         Financial Services and Markets Act                     
                         2000;                                                  
"UK Listing Rules"        the listing rules of the UK Listing                   
                         Authority;                                             
"UK Official List"        the official list maintained by the                   
                         UK Listing Authority;                                  
"UK Panel"                The Panel on Takeovers and Mergers;                   
"Underlying EBIT"         earnings before net finance costs                     
                         and taxation and any exceptional                       
                         items;                                                 
"United Kingdom" or       the United Kingdom of Great Britain                   
"UK"                      and Northern Ireland;                                 
"United States" or "US"   the United States of America, its                     
                         territories and possessions, any                       
State of the United States of                          
                         America and the District of                            
                         Columbia, and all other areas                          
                         subject to its jurisdiction; and                       
"US Offer"                part of the Rio Tinto plc Offer                       
                         being the offer to US holders of                       
                         Rio Tinto plc Shares and to holders                    
                         of Rio Tinto plc ADRs wherever                         
located to be made by BHP Billiton                     
                         Limited once the Pre-conditions                        
                         have been satisfied or waived, in                      
                         the terms and conditions set out in                    
Appendix II of this Announcement                       
                         and to be set out in the                               
                         Registration Statement on Form F-4                     
                         including where the context so                         
requires, any subsequent revision,                     
                         variation, extension or renewal of                     
                         the US Offer.                                          
For the purpose of these definitions, an entity that is controlled by           
another entity is a "controlled entity" of the other entity.  An entity         
controls a second entity if the first entity has the capacity to                
determine the outcome of decisions about the second entity`s financial          
and operating policies.  In determining whether the first entity has this       
capacity:                                                                       
- the practical influence the first entity can exert (rather than the           
rights it can enforce) is the issue to be considered; and                       
- any practice or pattern of behaviour affecting the second entity`s            
financial or operating policies is to be taken into account (even if it         
involves a breach of an agreement or a breach of trust).                        
However:                                                                        
(i)  the first entity does not control the second entity merely because         
the first entity and a third entity jointly have the capacity to                
determine the outcome of decisions about the second entity`s financial          
and operating policies;                                                         
(ii) if the first entity:                                                       
- has the capacity to influence decisions about the second entity`s             
financial and operating policies; and                                           
- is under a legal obligation to exercise that capacity for the benefit         
of someone other than the first entity`s members;                               
the first entity is taken not to control the second entity.                     
(1) Based on the volume weighted average market capitalisation of BHP           
Billiton and Rio Tinto over the month prior to the approach by BHP              
Billiton  to Rio Tinto.                                                         
(2)  Assuming full acceptance of the Offers on a fully diluted basis.           
(3) On the basis that BHP Billiton acquires 100 per cent of the shares in       
Rio Tinto Limited and Rio Tinto plc on the offer terms of 3.4 BHP               
Billiton shares for each Rio Tinto share.                                       
(4) On the basis that BHP Billiton acquires 100 per cent of the shares in       
Rio Tinto Limited and Rio Tinto plc on the offer terms of 3.4 BHP               
Billiton shares for each Rio Tinto share.                                       
(5)  On the basis that BHP Billiton acquires 100 per cent of the shares         
in Rio Tinto Limited and Rio Tinto plc on the offer terms of 3.4 BHP            
Billiton shares for each Rio Tinto share.                                       
(6) Unless otherwise stated production volumes exclude suspended and sold       
operations.                                                                     
(7) Held by the family company Alamiste Pty Ltd, DR & PA Trustee for the        
self-managed Alamiste superannuation fund and Mrs PA Argus.                     
(8) Held by Melpeat Pty Limited.                                                
(9) Held by HSBC nominees on behalf of Dr Morgan and the following              
persons connected with Dr Morgan: the Raymor Trust, Roslyn Joan Kelly and       
RJK Super Fund.                                                                 
Date: 06/02/2008 15:51:28 Produced by the JSE SENS Department.                  
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