BIL - BHP Billiton Plc - Reiterates the compelling12 Dec 2007
BIL
 BIBLT                                                                           
BIL - BHP Billiton Plc - Reiterates the compelling logic of its three for one   
share proposal to combine with Rio Tinto                                        
BHP Billiton Plc                                                                
Share code: BIL                                                                 
ISIN: GB0000566504                                                              
12 December 2007                                                                
Number 37/07                                                                    
BHP BILLITON REITERATES THE COMPELLING LOGIC OF ITS THREE FOR ONE SHARE PROPOSAL
TO COMBINE WITH RIO TINTO                                                       
HIGHLIGHTS(1)                                                                   
* Since 2001 BHP Billiton has created significantly greater shareholder value   
than Rio Tinto                                                                  
* Compared to Rio Tinto, BHP Billiton has delivered superior production growth  
and invested more capital in development, delivering projects on time and on    
budget                                                                          
* BHP Billiton has a superior growth profile to Rio Tinto due to its deeper ,   
longer-term inventory of projects and development options focused on large-     
scale, high-margin brownfield expansions                                        
* BHP Billiton`s growth prospects are based on a broad range of substantial tier
one assets including:                                                           
    - Western Australia Iron Ore: characterised by large, high-grade orebodies  
    clustered around key infrastructure with significant expansion options      
    - Olympic Dam (Australia): a world-class resource with conceptual staged    
expansions to increase production to 730ktpa copper, 19ktpa uranium and     
    800kozpa gold                                                               
    - Nickel: world`s third largest producer of nickel metal with conceptual    
    studies to at least double production at Cerro Matoso (Colombia)            
- Petroleum: rapidly increasing production profile over the next few years  
    from projects currently in execution with further growth opportunities      
    being pursued                                                               
* These outstanding growth prospects underpin BHP Billiton`s proposal to Rio    
Tinto of three BHP Billiton shares for one Rio Tinto share (reflecting a 41 per 
cent Rio Tinto shareholder interest in the combination) which it continues to   
believe offers Rio Tinto shareholders compelling value                          
* BHP Billiton will continue to seek an opportunity to discuss its proposal with
Rio Tinto given the significant incremental value that can only be unlocked     
through a combination of the two companies                                      
1    Introduction                                                               
    On 1 November 2007, the Board of BHP Billiton wrote to the Board of Rio     
Tinto proposing a combination of their respective companies to create an    
    organisation without peer in the natural resources industry.  The Board of  
    BHP Billiton has sought, and continues to seek, to engage in discussions    
    with the Board of Rio Tinto with a view to obtaining its support and        
recommendation for this proposal.  To date, Rio Tinto has not agreed to     
    these discussions.                                                          
    The proposal made to Rio Tinto involved a combination of BHP Billiton and   
    Rio Tinto to be completed by two inter-conditional schemes of arrangement,  
with each Rio Tinto shareholder receiving three BHP Billiton shares for     
    each Rio Tinto share held.                                                  
    This share exchange ratio implied a premium of approximately 28 per cent to 
    the combined volume weighted average market capitalisations of Rio Tinto    
Limited and Rio Tinto plc over the month ended 31 October 2007 (being the   
    last date prior to BHP Billiton`s approach to Rio Tinto), based on volume   
    weighted average BHP Billiton share prices over the same period.  Based on  
    BHP Billiton`s closing share prices on 9 November 2007, the total           
consideration offered to shareholders of Rio Tinto Limited and Rio Tinto    
    plc represents a premium of approximately 15 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 in      
    response to speculation about a potential offer for Rio Tinto at a premium. 
    Since the public presentation of the proposal, BHP Billiton has completed   
an extensive global programme of shareholder meetings.  The feedback from   
    those meetings has confirmed a clear understanding of the industrial logic  
    of the proposed combination.                                                
    BHP Billiton is considering its possible next steps and continues to talk   
to shareholders about their views. In the course of those conversations,    
    and recognising that BHP Billiton`s all share proposal requires an          
    assessment of relative values, a number of shareholders have requested a    
    more detailed picture of the relative performance and outlook of the two    
companies and, in particular, BHP Billiton`s contribution to the proposed   
    combination.                                                                
    Accordingly, BHP Billiton has released a copy of a presentation to be made  
    by Marius Kloppers in London this morning which will be simultaneously      
webcast.                                                                    
    This presentation puts into context why BHP Billiton continues to believe   
    that its proposal of three BHP Billiton shares for one Rio Tinto share      
    remains compelling. The presentation will facilitate further discussions    
with shareholders, which will provide further input to BHP Billiton as to   
    whether there is a basis for taking the proposal forward.                   
2    Unlocking Value                                                            
    Marius Kloppers said:                                                       
"Our proposal to Rio Tinto is about value and, in particular, it is about   
    unlocking material value through the combination that would otherwise be    
    lost.                                                                       
    As well, as an all share proposal, our proposition is about relative value, 
relative performance and relative contribution to the proposed combination. 
    In seeking to justify not engaging with us to discuss our proposal, Rio     
    Tinto has claimed that the proposal "significantly undervalues Rio Tinto    
    and its prospects". This statement is clearly at odds with the market`s     
assessment of the relative value of the two companies before our            
    announcement and with the material and sustained relative outperformance by 
    BHP Billiton since the formation of the BHP Billiton DLC in 2001.           
    This demonstrated outperformance has generated a superior Total Shareholder 
Return for BHP Billiton shareholders and BHP Billiton`s superior growth     
    prospects position us well to continue our outperformance.                  
    Just as BHP Billiton undertook a range of timely initiatives to establish   
    our outperformance, so it has also taken the initiative to propose a        
combination of these two companies. Our proposal would unlock material      
    additional value and enhance the future prospects for the combined company  
    to continue our strong performance in relation to other resource companies, 
    for the benefit of both sets of shareholders.                               
No shareholder is being asked to sell out at this stage of the cycle.       
    Instead, Rio Tinto shareholders are being asked to participate in building  
    an even better company and, as part of that opportunity, receive            
    substantial additional value through the three for one exchange ratio.      
For us to achieve the benefits for shareholders that we have proposed, we   
    need the approval of both Rio Tinto and BHP Billiton shareholders. Both     
    sets of shareholders must have an incentive and see value in our proposal.  
    We continue to believe that our proposal is compelling and in the interests 
of both sets of shareholders."                                              
3    Further Detail of the Presentation(2)                                      
3.1  Superior shareholder value creation                                        
    * At the formation of the BHP Billiton DLC in 2001, BHP Billiton`s market   
capitalisation exceeded that of Rio Tinto by US$7bn. BHP Billiton`s market  
    capitalisation has since grown at a compound annual growth rate of 37 per   
    cent compared to Rio Tinto`s of 29 per cent. As a consequence, at the date  
    of the BHP Billiton proposal, the BHP Billiton market capitalisation        
exceeded that of Rio Tinto by more than US$100bn                            
    * BHP Billiton has continually invested in the development of its business  
    throughout the cycle, delivering growth projects on time and below budget;  
    BHP Billiton`s investment in organic growth projects since the formation of 
the BHP Billiton DLC has been more than double that of Rio Tinto            
    * BHP Billiton has far exceeded Rio Tinto`s production growth (calculated   
    on a copper units equivalent basis) since the formation of the BHP Billiton 
    DLC, with a compound annual growth rate of 8 per cent per annum, compared   
with Rio Tinto at 4 per cent per annum                                      
    * Since 2002, this has translated to superior compound annual growth rates  
    for Earnings Per Share (50 per cent p.a. vs 37 per cent p.a.) and ordinary  
    Dividends Per Share (29 per cent p.a. vs 11 per cent p.a.), and it has      
delivered superior Total Shareholder Returns relative to Rio Tinto (30 per  
    cent p.a. vs 23 per cent p.a.)                                              
3.2 Superior growth profile                                                     
    * BHP Billiton has 17 major projects in execution representing capital      
expenditure of US$12.3bn (our share); 12 major projects in feasibility      
    representing capital expenditure of US$6.1bn plus future options estimated  
    at more than US$50bn. BHP Billiton`s total project pipeline is more than    
    US$70bn                                                                     
* BHP Billiton`s project pipeline is diverse by commodity and is targeted   
    towards high-margin businesses in low-risk geographies.  BHP Billiton       
    expects to deliver future EBITDA with greater security and lower risk per   
    dollar of capital expenditure                                               
3.3 Growth options in selected commodity groups and assets                      
3.3.1 Iron ore                                                                  
    * BHP Billiton`s Western Australian iron ore business is characterised by   
    large, high-grade orebodies, clustered around key infrastructure.  The      
three mining hubs that have been developed and the closer geographic        
    proximity of BHP Billiton`s mineralised assets means that future            
    development and expansion is expected to involve relatively less new        
    transport infrastructure than that likely to be required by the spread of   
Rio Tinto`s resources                                                       
    * There is a high level of equity ownership of the underlying resources (85 
    per cent -100 per cent) and operations                                      
    * On an equity basis, BHP Billiton`s compound annual growth rate in the     
development of its Pilbara iron ore production is expected to exceed that   
    of Rio Tinto over both the combined 1990-2006 actual and 2007-2018 forecast 
    periods                                                                     
    * BHP Billiton`s additional targeted mineralisation position is similar in  
size to that of Rio Tinto with a number of significant expansion options.   
    On an equity basis, BHP Billiton`s additional targeted Pilbara iron ore     
    mineralisation exceeds that of Rio Tinto                                    
    * Infrastructure expansion plans are well advanced.  The rail system can be 
developed to meet BHP Billiton`s future growth plans and BHP Billiton`s     
    port capacity expansion at Port Hedland`s inner harbour is in progress,     
    with well advanced plans to take its inner harbour capacity to 200Mtpa.  In 
    addition, there is strong government support for an ultimate expansion of   
the outer harbour to more than 400Mtpa, meaning total port capacity at Port 
    Hedland would exceed 700Mtpa for all users                                  
    * While neither BHP Billiton nor Rio Tinto "needs" the other`s iron ore     
    business, the combination would unlock incremental value and efficiencies   
that are unique to the combination.  This would result in an ability to     
    deliver more tonnes to customers faster than would be possible were the two 
    companies to remain separate                                                
3.3.2 Olympic Dam                                                               
* Studies have indicated that the Olympic Dam orebody (100 per cent owned)  
    is the world`s fourth largest copper deposit; largest uranium deposit and   
    the fifth largest gold deposit based on remaining resources.  Unlike other  
    prospective global copper developments, Olympic Dam is an operating mine    
and a brownfield development site in a first-world location                 
    * BHP Billiton is today confirming that its preferred expansion concept     
    is based on a three stage project configuration                             
    * BHP Billiton`s conceptual studies of brownfield expansion plans           
(Stages 1-3) would take production up to 730ktpa copper, 19ktpa uranium     
    and 800kozpa gold; this represents larger prospective copper production     
    than the aggregate of Rio Tinto`s identified growth projects (including     
    Peruvian and Mongolian reenfield development options)                       
3.3.3 Nickel                                                                    
    * BHP Billiton is currently the world`s third largest producer of nickel    
    metal, with the Cerro Matoso asset presenting an opportunity for further    
    significant production growth                                               
* Conceptual studies for a third and fourth line at Cerro Matoso as well as 
    the Heap Leach project have revealed the potential to at least double       
    nickel production at this operation within 10 years                         
    * Nickel West (Australia) features five brownfield development projects out 
to 2014 and Ravensthorpe is scheduled to enter production in calendar year 2008 
3.3.4 Petroleum                                                                 
    * BHP Billiton`s petroleum business has a strong history of successful      
    discovery and development and has a rapidly increasing production profile   
over the next few years from projects currently in development              
    * BHP Billiton estimates that future production growth until 2010 at a 10.5 
    per cent compound annual growth rate is underpinned by more than six firm   
    projects in execution                                                       
* BHP Billiton have had significant success over the last five years in     
    deepwater Gulf of Mexico with multiple finds, in Trinidad with Angostura,   
    and in Western Australia with Stybarrow, Pyrenees and Macedon               
    * BHP Billiton`s development pipeline after 2010 has an extensive project   
slate including Scarborough, Browse and Thebe opportunities in Western      
    Australia                                                                   
    * Major new resources are also being pursued in deep water Gulf of Mexico,  
    Malaysia, Colombia, South Africa and the Falkland Islands                   
3.4 Conclusion                                                                  
    * Any argument that Rio Tinto was or is "undervalued" relative to BHP       
    Billiton cannot be sustained and is not supported by the relative           
    performance of and outlook for the two companies                            
* BHP Billiton has been the superior performer and it has delivered         
    superior operational and earnings performance over the period since the     
    formation of the BHP Billiton DLC as demonstrated by the expansion of the   
    market capitalisation difference from US$7bn in 2001 to in excess of        
US$100bn at the date of the proposal to Rio Tinto                           
    * BHP Billiton`s superior track record is clearly demonstrable in its       
    greater compound annual growth of Total Shareholder Returns (30 per cent vs 
    23 per cent) over the same period                                           
* BHP Billiton offers outstanding standalone growth prospects, represented  
    by a US$70bn growth pipeline featuring a focus on high EBITDA margin        
    businesses, and broad geographic and commodity diversity                    
    * The proposal to combine BHP Billiton and Rio Tinto would unlock           
substantial value and is logical and compelling.  While each company        
    features high-quality businesses and growth pipelines, the incremental      
    earnings arising from the combination would add to the returns to both sets 
    of shareholders.  This incremental return cannot be replicated by any other 
combination.  If not harvested, this value will be lost, to the detriment   
    of both sets of shareholders                                                
    * The proposal incorporates a premium of 28 per cent to the combined volume 
    weighted average market apitalizations of Rio Tinto Limited and Rio Tinto   
plc over the month ended 31 October 2007 (being the last date prior to BHP  
    Billiton`s approach to Rio Tinto), based on volume weighted average BHP     
    Billiton share prices over the same period. If the two companies had merged 
    on a nil premium basis at that time, Rio Tinto shareholders would have      
owned 36 per cent of the combined company and the share exchange ratio      
    would have been 2.4:1. Each Rio Tinto shareholder is being offered three    
    BHP Billiton shares for each Rio Tinto share, up from the 2.4 ratio implied 
    by the market values prior to the BHP Billiton approach.  This means Rio    
Tinto shareholders would own 41 per cent of the combined company, up from   
    the 36 per cent before the approach.  This is a material value uplift but,  
    as well, Rio Tinto shareholders would share in the additional value         
    unlocked by the combination each and every year that they remain a          
shareholder                                                                 
    * It is clearly and simply a compelling proposal.  It is, however, a        
    combination that must create value and benefit for shareholders of BHP      
    Billiton as well as Rio Tinto                                               
* BHP Billiton looks forward to the opportunity to discuss its proposal     
    with Rio Tinto                                                              
4    Further Details                                                            
    There will be a joint presentation to analysts and investors on this        
announcement in London at 9:00 AM GMT (8:00 PM AEDT) today at Goldman Sachs 
    International, River Court Building, 120 Fleet Street, London EC4A 2BB,     
    with a web casting facility on BHP Billiton`s web site                      
    (www.bhpbilliton.com).  There will also be a dial-in conference call        
facility for the presentation.  Dial-in details are:                        
    Australia:     +61 29 274 0790 or 1800 444 103                              
    Canada:   1 866 228 9189                                                    
    Hong Kong:     +852 3009 5027                                               
Japan:    +81 3 357 08179 or 00531 440 034                                  
    New Zealand:   64 9 912 1386 or 0508 555 365                                
    South Africa:  0800 99 1273                                                 
    Singapore:     +65 6823 2087 or 800 448 1303                                
UK caller paid:     +44 207154 2683 or 0800 358 5268                        
    US caller paid:     +1 480 248 5081 or 1 800 762 8779                       
    Emergency back-up (US):  + 1 480 248 5081                                   
    A recording of the presentation will be accessible through BHP Billiton`s   
web site - www.bhpbilliton.com.                                             
Contacts:                                                                       
Australia                                 United Kingdom                        
Samantha Evans, Media Relations           Andre Liebenberg, Investor            
Tel: +61 3 9609 2898                      Relations                             
Mobile: +61 400 693 915                   Tel: +44 20 7802 4131                 
email: Samantha.Evans@bhpbilliton.com     Mobile: +44 7920 236 974              
                                         email:                                 
Andre.Liebenberg@bhpbilliton.com       
                                                                                
Don Carroll, Investor Relations           Illtud Harri, Media Relations         
Tel: +61 3 9609 2686                      Tel: +44 20 7802 4195                 
Mobile: +61 417 591 938                   Mobile: +44 7920 237 246              
email: Don.A.Carroll@bhpbilliton.com      email: Illtud.Harri@bhpbilliton.com   
                                                                                
United States                             South Africa                          
Tracey Whitehead, Investor & Media        Alison Gilbert, Investor Relations    
Relations                                 Tel: SA +27 11 376 2121               
Tel: US +1 713 599 6100                   or UK +44 20 7802 4183                
or UK +44 20 7802 4031                    Mobile: +44 7769 936 227              
Mobile: +44 7917 648 093                  Email:                                
email: Tracey.Whitehead@bhpbilliton.com   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
or a proposal to make a takeover bid in any jurisdiction.                       
The directors of BHP Billiton accept responsibility for the information         
contained in this announcement. Having taken all reasonable care to ensure that 
such is the case, the information contained in this announcement is, to the best
of the knowledge and belief of the directors of BHP Billiton, in accordance with
the facts and contains no omission likely to affect its import.                 
The release, publication or distribution of this announcement in jurisdictions  
other than the United Kingdom and Australia may be restricted by law and        
therefore any persons who are subject to the laws of any other jurisdiction     
should inform themselves about, and observe, any applicable requirements.  This 
announcement has been prepared for the purposes of complying with English and   
Australian law and the UK City Code and the information disclosed may not be the
same as that which would have been disclosed if this announcement had been      
prepared in accordance with the laws of other jurisdictions.                    
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, revenue benefits (and  
resulting incremental EBITDA) and EPS accretion in this announcement should be  
interpreted to mean that the future earnings per share of the enlarged BHP      
Billiton 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 revenue 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.            
This announcement does not constitute an offer to sell or invitation to purchase
any securities or the solicitation of any vote or approval in any jurisdiction. 
Goldman Sachs International and its affiliates, and Gresham Partners are acting 
for BHP Billiton and no-one else in connection with the proposals referred to in
this document and will not be responsible to any other person for providing the 
protections afforded to their respective clients, or for providing advice in    
relation to such proposals or any other transaction, arrangement or matter      
referred to herein.                                                             
In connection with BHP Billiton`s proposed combination with Rio Tinto by way of 
the proposed Schemes of Arrangement ("Schemes"), the new BHP Billiton shares to 
be issued to Rio Tinto shareholders under the terms of  the Schemes have not    
been, and will not be, registered under the US Securities Act of 1933, as       
amended, or under the securities laws of any state, district or other           
jurisdiction of the United States, and no regulatory clearances in respect of   
the new BHP Billiton shares have been, or (possibly with certain limited        
exceptions) will be, applied for in any jurisdiction of the United States.  It  
is expected that the new BHP Billiton shares will be issued in reliance upon the
exemption from the registration requirements of the US Securities Act provided  
by Section 3(a)(10) thereof.                                                    
In the event that the proposed Schemes do not qualify (or BHP Billiton otherwise
elects pursuant to its right to proceed with the transaction in a manner that   
does not qualify) for an exemption from the registration requirements of the US 
Securities Act, BHP Billiton would expect to register the offer and sale of     
securities it would issue to Rio Tinto US shareholders and Rio Tinto ADS 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 SECURITIES AND ALL HOLDERS OF RIO  
TINTO ADSs 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, IF AND WHEN THEY BECOME AVAILABLE BECAUSE THEY WILL CONTAIN IMPORTANT
INFORMATION.                                                                    
If and when filed, investors and security holders will be able to obtain a free 
copy of the Registration Statement, 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.    
Dealing Disclosure Requirements                                                 
Under the provisions of Rule 8.3 of the Takeover Code (the "Code"), if any      
person is, or becomes, "interested" (directly or indirectly) in 1 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 also 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 1 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 "offer period" 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 Takeover 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
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 Panel.             
APPENDIX I                                                                      
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, investor presentations 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           
Australian Securities Exchange 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 GBP18.31, 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 GBP17.99 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$42.47, provided by the           
Australian Securities Exchange on 9 November 2007, being the last           
    practicable date prior to BHP Billiton`s announcement of 12 November.       
(g)  The market value of BHP Billiton Plc shares is based on the closing middle-
    market price of a BHP Billiton Plc share of GBP16.28, provided by the       
London Stock Exchange on 9 November 2007, being the last practicable date   
    prior to BHP Billiton`s announcement of 12 November.                        
(h)  As at 9 November 2007 (being the last practicable date prior to BHP        
    Billiton`s announcement of 12 November 2007) there were 2,256,993,546 BHP   
Billiton Plc shares (including 20,072,510 BHP Billiton Plc shares held by   
    BHP Billiton Limited) and 3,358,359,496 BHP Billiton Ltd 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 Australian        
Securities Exchange 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 GBP44.90, 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 GBP43.09 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$130.90, provided by the Australian        
Securities Exchange on 9 November 2007, being the last practicable date     
    prior to BHP Billiton`s announcement of 12 November.                        
(m)  The market value of Rio Tinto plc shares is based on the closing middle-   
    market price of a Rio Tinto plc share of GBP56.24, provided by the London   
Stock Exchange on 9 November 2007, being the last practicable date prior to 
    BHP Billiton`s announcement of 12 November.                                 
(n)  As at 9 November 2007 (being the last practicable date prior to BHP        
    Billiton`s announcement of 12 November 2007) there were 456,815,943 Rio     
Tinto Limited shares and 997,082,015 Rio Tinto plc shares in issue. Rio     
    Tinto plc, through THA Holdings Australia Pty Limited, holds 171,072,520    
    shares in Rio Tinto Limited.                                                
(o)  All references to the share capital or market capitalisation of Rio Tinto  
Limited refer to the publicly traded shares, or free float, of Rio Tinto    
    Limited, which excludes the Rio Tinto Limited shares held by a wholly-owned 
    subsidiary of Rio Tinto plc.                                                
(p)  All references to the share capital or market capitalisation of BHP        
Billiton exclude shares held as treasury shares and shares currently held   
    by BHP Billiton Limited in BHP Billiton Plc and not yet cancelled.          
(q)  The exchange rate of 2.077 US$/GBP and 0.927 US$/A$ on 31 October 2007.    
(r)  The exchange rate of 2.095 US$/GBP and 0.914 US$/A$ on 9 November 2007.    
APPENDIX II                                                                     
Definitions                                                                     
"GBP"                              United Kingdom pounds sterling;              
"A$"                          Australian dollars;                               
"Alcan"                       Alcan, Inc;                                       
"Australia"                   the Commonwealth of Australia, its states,        
                             territories and possessions;                       
"BHP Billiton"                BHP Billiton Plc or BHP Billiton Limited, or both,
or the BHP Billiton group, as the context may      
                             require;                                           
"Board" or "Directors"        means the directors of Rio Tinto plc and Rio Tinto
                             Limited, or the directors of BHP Billiton Plc and  
BHP Billiton Limited, or the directors of the      
                             combined group, as the context may require;        
"EBITDA"                      Earnings before Interest, Taxes, Depreciation and 
                             Amortisation;                                      
"Financial Services Authority"     the UK Financial Services Authority, which is
                             an independent non-governmental body given         
                             statutory powers by the Financial Services and     
                             Markets Act 2000;                                  
"Listing Rules"               the listing rules of the UK Listing Authority;    
"Panel"                       the UK Panel on Takeovers and Mergers;            
"Rio Tinto ADSs"              Rio Tinto plc`s American Depositary Shares        
                             representing four Rio Tinto plc shares per         
American Depositary Share and listed on the New    
                             York Stock Exchange;                               
"Rio Tinto"                   Rio Tinto plc or Rio Tinto Limited, or both, or   
                             the Rio Tinto group, as the context may require;   
"SEC"                         United States Securities and Exchange Commission; 
"UK City Code"                the UK City Code on Takeovers and Mergers;        
"UK Listing Authority"        the Financial Services Authority acting in its    
                             capacity as the competent authority for the        
purposes of Part VI of the Financial Services and  
                             Markets Act 2000;                                  
"United Kingdom"              the United Kingdom of Great Britain and Northern  
                             Ireland;                                           
"US Securities Act"           US Securities Act of 1933, as amended from time to
                             time; and                                          
"US$"                         United States dollars.                            
(1)  Further details are contained in this announcement                         
(2)  This section is a summary of the key points that are made in BHP Billiton`s
    presentation titled "BHP Billiton and Rio Tinto: A Matter of Value"         
    released today. A copy of the presentation is available on                  
    www.bhpbilliton.com.                                                        
Date: 12/12/2007 09:59:01 Produced by the JSE SENS Department.                  
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