Filed by: BHP Billiton Plc

and BHP Billiton Limited

Pursuant to Rule 425 under the Securities Act of 1933

Subject Company: Rio Tinto plc

Commission File No.: 001-10533

The following are slides comprising a presentation that was first given on October 7, 2008.

Resourcing the Future 7 October 2008 Don Argus Chairman Citi Smith Barney Special Company Presentation SHANGHAI

Slide 2 Disclaimer By reviewing/attending this presentation you agree to be bound by the following conditions. The directors of BHP Billiton Limited and BHP Billiton Plc (“BHP Billiton") accept responsibility for the information contained in this presentation. Having taken all reasonable care to ensure that such is the case, the information contained in this presentation 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. Subject to the above, neither BHP Billiton nor any of its directors, officers, employees or advisers nor any other person makes any representation or warranty, express or implied, as to, and accordingly no reliance should be placed on, the fairness, accuracy or completeness of the information contained in the presentation or of the views given or implied.  To the extent permitted by law, neither BHP Billiton nor any of its directors, officers, employees or advisers nor any other person shall have any liability whatsoever for any errors or omissions or any loss howsoever arising, directly or indirectly, from any use of this information or its contents or otherwise arising in connection therewith.  Information about Rio Tinto plc and Rio Tinto Limited ("Rio Tinto") is based on public information which has not been independently verified. This presentation is for information purposes only and does not constitute or form part of any offer for sale or issue of any securities or an offer or invitation to purchase or subscribe for any such securities, nor shall it or any part of it be relied on in connection with, any contract or investment decision, nor does it constitute a proposal to make a takeover bid or the solicitation of any vote or approval in any jurisdiction, nor shall there be any sale of securities in any jurisdiction in which such offer, solicitation or sale would be unlawful prior to registration or qualification under the securities laws of any such jurisdiction (or under an exemption from such requirements).  No offering of securities shall be made into the United States except pursuant to registration under the US Securities Act of 1933, as amended, or an exemption therefrom.  Neither this presentation nor any copy of it may be taken or transmitted or distributed or redistributed (directly or indirectly) in Japan.  The distribution of this document in other jurisdictions may be restricted by law and persons into whose possession this document comes should inform themselves about, and observe, any such restrictions.  This presentation is directed only at persons who (i) are persons falling within Article 49(2)(a) to (d) ("high net worth companies, unincorporated associations etc.") of the Financial Services and Markets Act 2000 (Financial Promotion) Order 2005 (as amended) (the "Order") or (ii) have professional experience in matters relating to investments falling within Article 19(5) of the Order or (iii) are outside the United Kingdom (all such persons being referred to as "relevant persons").  This presentation must not be acted on or relied on by persons who are not relevant persons.  Certain statements in this presentation are forward-looking statements (including statements regarding contribution synergies, future cost savings, the cost and timing of development projects, future production volumes, increases in production and infrastructure capacity, the identification of additional mineral Reserves and Resources and project lives and, without limitation, other statements typically containing words such as "intends," "expects," "anticipates," "targets," plans," "estimates" and words of similar import.)  These statements are based on current expectations and beliefs and numerous assumptions regarding BHP Billiton's present and future business strategies and the environments in which BHP Billiton and Rio Tinto will operate in the future and such assumptions, expectations and beliefs may or may not prove to be correct and by their nature, are subject to a number of known and unknown risks and uncertainties that could cause actual results, performance and achievements to differ materially. Factors that could cause actual results or performance to differ materially from those expressed or implied in the forward-looking statements include, but are not limited to, BHP Billiton's ability to successfully combine the businesses of BHP Billiton and Rio Tinto and to realise expected synergies from that combination, the presence of a competitive proposal in relation to Rio Tinto, satisfaction of any conditions to any proposed transaction, including the receipt of required regulatory and anti-trust approvals, Rio Tinto’s willingness to enter into any proposed transaction, the successful completion of any transaction, and the risk factors discussed in BHP Billiton's and Rio Tinto’s filings with the U.S. Securities and Exchange Commission ("SEC") (including in Annual Reports on Form 20-F for the fiscal years ended 30 June 2008 and 31 December 2007, respectively) which are available at the SEC's website (http://www.sec.gov).  Save as required by law or the rules of the UK Listing Authority and the London Stock Exchange, the UK Takeover Panel, or the listing rules of ASX Limited, BHP Billiton undertakes no duty to update any forward-looking statements in  this presentation.

Slide 3 Disclaimer (continued) No statement concerning expected cost savings, revenue benefits (and resulting incremental EBITDA) and EPS accretion in this presentation should be interpreted to mean that the future earnings per share of the enlarged BHP Billiton group for current and future financial years will necessarily match or exceed the historical or published earnings per share of BHP Billiton, and the actual estimated cost savings and revenue benefits (and resulting EBITDA enhancement) may be materially greater or less than estimated. References in this presentation to “$” are to United States dollars unless otherwise specified.  Information Relating to the US Offer for Rio Tinto plc In connection with the offer and sale of securities BHP Billiton would issue to Rio Tinto plc US shareholders and Rio Tinto plc ADS holders, BHP Billiton has filed with the SEC a Registration Statement on Form F-4 (the “Registration Statement”), which contains a  preliminary prospectus (the “Prospectus”), and will file additional relevant materials with the SEC.  This communication is not a substitute for the Registration Statement or the Prospectus that BHP Billiton has filed, or any amendments or supplements to those documents 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 ADSs ARE URGED TO READ THE REGISTRATION STATEMENT, THE 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 are 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).  Copies of such documents may also be obtained from BHP Billiton without charge. 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 U.S. 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 U.S. securities laws. It may be difficult to compel a foreign company and its affiliates to subject themselves to a U.S. court's judgment. You should be aware that BHP Billiton may purchase securities of either Rio Tinto plc or Rio Tinto Limited otherwise than under the exchange offer, such as in open market or privately negotiated purchases.

Slide 4 0 2 4 6 8 10 12 14 Short-term global economic challenges exist Source:  IMF, Data:  IMF, IMF Forecasts. Gross domestic production (% growth, constant 2006 US$) Asian Banking Crisis Technology Correction Current US Financial Crisis China Emerging Economies Developed Economies

Slide 5 Housing Structural Reform High Value Manufacturing Rising Incomes Rural Development Urbanisation However in the long-term China remains on the steep part of the development curve supported by six growth drivers

Slide 6 Growth in crude steel production (CY2000-2007) (mt) 73% 5% 3% 4% 15% Japan Europe China Other India Urbanisation and industrialisation is expected to continue to drive demand for steelmaking raw materials… Source:  IISI and BHP Billiton estimates. Note crude steel production growth calculated based on the change in annual production between 2000 and 2007. Mount Newman Illawarra Coal

Slide 7 …and energy consumption 36% 9% 5% 50% China Other Europe North America Growth in energy consumption CY2000-2007 (mmtoe) Source: BP Statistical Review of World Energy 2008. Notes: Primary energy comprises commercially traded fuels only. Oil consumption measured in million tonnes, other fuels converted to million tonnes of oil equivalent as detailed in the Appendices of the Review. North West Shelf Greater Angostura

Slide 8 Outstanding performance Neptune – Gulf of Mexico

Slide 9 Our core strategy sets us apart in our industry • Focus on Tier 1 assets that are large, low-cost and expandable • Focus on the extraction of upstream natural resources • Portfolio diversified by commodity, customer and geography reducing the volatility of cash flows • Maintenance of a deep diversified inventory of growth options • Focus on export orientated products • Overriding commitment to ethics, safety, environmental practice and community engagement • Employer of choice, and a preferred partner for countries and customers Simplicity Accountability Effectiveness

Slide 10 0 100 200 300 400 500 600 700 BHP Billiton Rio Tinto(a) Vale Xstrata Anglo American Note: EBIT and Employees as per last published Annual Report, data does not include contractors. BHP Billiton as at 30-Jun-2008; Rio Tinto, Vale, Xstrata and Anglo American as at 31-Dec-2007. a) Rio Tinto Post Alcan EBIT based on CY2007 full year proforma results. EBIT per employee (US$’000) Pre-Alcan Post-Alcan Despite our size, simplicity is a core element of this strategy

Slide 11 Outstanding FY2008 result driven by strategy and execution • Achieved record profit for the 7 th consecutive year • Attributable profit up 12%, EPS up 18% • Dividend rebased upwards a signal of our outlook confidence • Full year dividend of 70 US cents per share, 49% increase • Production increases in 13 commodities, records in 7 • 10 major growth projects completed • A further 7 major projects sanctioned by the Board • Strong performance demonstrates the power of our diversified and high margin portfolio Underlying EBIT margin (a) (FY2008) 48% 67% 30% 31% 62% 51% 58% 24% 58% 20% Iron Ore Manganese Energy Coal Metallurgical Coal Diamonds and Specialty Products Base Metals Petroleum Stainless Steel Materials Aluminium Group

Slide 12 % EBIT margin (a) FY2002 FY2003 FY2004 FY2005 FY2006 FY2007 FY2008 0 10 20 30 40 50 60 70 80 H1 H2 H1 H2 H1 H2 H1 H2 H1 H2 H1 H2 H1 H2 Petroleum Aluminium Base Metals D&SP SSM Iron Ore Manganese Met Coal Energy Coal BHP Billiton Notes: a) FY2002 to FY2005 are calculated under UKGAAP. Subsequent periods are calculated under IFRS. All periods exclude third party trading activities. The benefits of diversification across a high margin portfolio

Slide 13 0 2,000 4,000 6,000 8,000 10,000 12,000 14,000 CY2007 CY2008F CY2009F CY2010F CY2011F CY2012F We are accelerating growth from a diversified project portfolio % of growth CY2007-2012 (Estimated & unrisked) Note: Growth in production volumes on a copper equivalent units basis between CY2007 and CY2012 calculated using BHP Billiton estimates for BHP Billiton production. Production volumes exclude BHP Billiton’s Specialty Products operation and all bauxite production. All energy coal businesses are included. Alumina volumes reflect only tonnes available for external sale. Conversion of production forecasts to copper equivalent units completed using long term consensus price forecasts, plus BHP Billiton assumptions for diamonds, domestic coal and manganese. Prices as at July 2008. Expected production growth (Copper equivalent tonnes '000s) 45% 37% 18% Steelmaking Materials Energy Non-Ferrous

Slide 14 Focused on low risk volume growth from existing assets and in our own backyard By project type (b) 87% 13% Brownfield Greenfield By region (c) Existing New 3% 97% 63% Notes: a) Growth in production volumes on a copper equivalent units basis between CY2007 and CY2012 calculated using BHP Billiton estimates for BHP Billiton production. Production volumes exclude BHP Billiton’s Specialty Products operation and all bauxite production. All energy coal businesses are included. Alumina volumes reflect only tonnes available for external sale. Conversion of production forecasts to copper equivalent units completed using long term consensus price forecasts, plus BHP Billiton assumptions for diamonds, domestic coal and manganese. Prices as at July 2008. b) Brownfield includes growth from existing operations as at 31-Dec-2007, as well as expansions and additional developments of, or around those assets. c) Existing regions represents those countries in which BHP Billiton already has asset operating as at 31-Dec-2007. Expected production growth (a) (Copper equivalent tonnes, CY2007-CY2012)

Slide 15 Example Olympic Dam

Slide 16 The Rio Tinto Offer

Slide 17 • Pre-conditional offer, capable of acceptance by shareholders following completion of regulatory processes and posting of offer documents • Regulatory processes anticipated to be completed around the end of 2008 • Rio Tinto shareholders are being offered 3.4 BHP Billiton shares for every Rio Tinto share held • All share offer – No shareholder forced to exit – Ability to participate in the synergies as well as the premium – CGT rollover relief for eligible shareholders (a) • Unlocks US$3.7bn per annum of quantifiable synergies (b) • The offer represents a 45% premium to the undisturbed price (c) • 50% minimum acceptance condition (d) • Proposed share buyback of up to US$30bn following completion if the offer is successful (e) • BHP Billiton believes this offer is compelling for Rio Tinto shareholders, and value enhancing for BHP Billiton shareholders Overview of the offer for Rio Tinto Notes: a) Australian CGT rollover relief will be available for Australian resident shareholders accepting the Rio Tinto Ltd Offer if compulsory acquisition is reached in the Rio Tinto Ltd Offer. UK “rollover” provisions will apply to accepting Rio Tinto plc shareholders if there are at least 70 per cent acceptances under the Rio Tinto plc Offer. b) Estimated incremental EBITDA based on publicly available information. To be read in conjunction with the notes in Appendix IV of BHP Billiton’s announcement dated 6-Feb-2008. Full run rate synergies expected by year 7. c) Premium based on the combined volume-weighted market capitalisation of Rio Tinto based on the volume-weighted average closing share prices over the month ended 31-Oct-2007 of £43.09 and A$109.20 for Rio Tinto plc and Rio Tinto Ltd respectively and volume-weighted average closing share prices over the month ended 31-Oct-2007 of BHP Billiton Plc and BHP Billiton Ltd of £17.99 and A$45.77 respectively. Based on BHP Billiton and Rio Tinto issued ordinary shares outstanding (excluding Treasury shares and cross shareholdings eg. Rio Tinto plc’s shareholding in Rio Tinto Ltd) as at 9-Nov-2007 and exchange rates of 2.077 US$/£ and 0.927 US$/A$ as at 31-Oct-2007   NOTE: Consistent with the UK City Code on Takeovers and Mergers, the offer represents a 21% discount based on the combined market capitalisation of Rio Tinto based on the closing share prices of Rio Tinto plc of £43.50 on 7 - Nov-2007 and Rio Tinto Ltd of A$113.40 on 8-Nov-2007 and closing share prices of BHP Billiton Plc and BHP Billiton Ltd of £11.87 and A$30.42 respectively on 3-Oct-2008. Based on BHP Billiton and Rio Tinto issued ordinary shares outstanding (excluding Treasury shares and cross shareholdings eg. Rio Tinto plc’s shareholding in Rio Tinto Ltd) as at 3-Oct-2008 and exchange rates of 1.772 US$/£ and 0.775 US$/A$ as at 3-Oct-2008. b) The offer is conditional on more than 50% acceptances of the publicly held shares in each of Rio Tinto plc and Rio Tinto Ltd. c) i.e. if BHP Billiton acquires 100% of the shares in Rio Tinto Limited and Rio Tinto plc on the 3.4:1 announced offer terms.

Slide 18 Notes: a) Estimated incremental EBITDA based on publicly available information. To be read in conjunction with the notes in Appendix IV of BHP Billiton’s announcement dated 6-Feb-2008. Full run rate synergies   expected by year 7. The benefits of the combination • Optimising mineral basin positions and infrastructure – Lower cost, more efficient production – Unlocking volume through matching reserves with infrastructure • Enhanced platform for future growth – Deployment of scarce resources to highest value opportunities – Greater ability to develop the next generation of large scale projects in new geographies – Better positioned as partner of choice with governments and stakeholders – Efficient exploration and infrastructure development • Unique synergies and combination benefits – Quantifiable synergies of US$3.7bn per annum (a) – Economies of scale – especially procurement – Avoid duplication, reduce corporate and divisional non-operating costs – Accelerate tonnage delivered to market WA Iron Ore operations (Central & East Pilbara) BHP Billiton’s Tenements Rio Tinto’s Tenements BHP Billiton Railway Rio Tinto Railway Goonyella Riverside Broadmeadow 48 Gregory 26 Kestrel 48 Norwich Park 48 Saraji 48 Peak Downs 26 Blair Athol 48 48 48 48 48 26 Hail Creek South Water Creek Poitrel Blackwater 48 BHP Billiton Rio Tinto Queensland Coal Hay Point

Slide 19 3.4:1 offer represents compelling value Source: Datastream (as at 3-Oct-2008). a) Exchange ratio assumes 100% BHP Billiton Ltd shares for each Rio Tinto Ltd share and BHP Billiton shares for each Rio Tinto plc share consisting of 80% BHP Billiton Plc shares and 20% BHP Billiton Ltd shares. Rio Tinto vs BHP Billiton historical share exchange ratio (a) 2.2 : 1 2.4 : 1 2.6 : 1 2.8 : 1 3.0 : 1 3.2 : 1 3.4 : 1 3.6 : 1 Jul-2007 Sep-2007 Nov-2007 Jan-2008 Mar-2008 May-2008 Jul-2008 Sep-2008 BHP Billiton's offer for Rio Tinto 1-Oct-2008 ACCC clears proposed acqusition of Rio Tinto

Slide 20 Comparative dividend per share Rio Tinto BHP Billiton A$25.92 (2.6% yield) A$19.16 (1.9% yield) Rio Tinto BHP Billiton US$8.5bn US$42.1bn FY2008 dividends per A$1,000 of shares (a) Net debt (c) Notes: a) Calculated based on Rio Tinto Ltd and BHP Billiton Ltd share prices as at 3-Oct-2008 and using the dividend for the respective periods as paid in A$ by BHP Billiton and Rio Tinto. b) Dividends per share on a US$ basis. Rio Tinto’s ordinary dividends per share restated to June year end. c) As at 30-Jun-2008. 31% 49% Rio Tinto BHP Billiton 2.2 x 5.4 x Rio Tinto BHP Billiton FY2007 to FY2008 DPS growth (b) FY2008 vs FY2002 DPS (b)

Slide 21 Combination is about reducing risk, not increasing it BHP Billiton Ltd vs Rio Tinto Ltd relative performance (a) (Price performance relative to Jun-2001 = 100) Notes: a) For the period 29-Jun-2001 to 31-Oct-2007. 0 100 200 300 400 500 0 100 200 300 400 500 Rio Tinto Indexed Share Price Performance • Increased size does not mean increased complexity – simplicity of the business model remains key • Operating as 1 company results in – More diversified asset portfolio, lower risk – An enhanced portfolio of growth opportunities – Reduced risk of large scale investments – Operating and capital cost efficiencies – More production, faster and at lower cost • Key management positions will be filled by drawing on the best of both management teams • High share price correlation means similar portfolio concentration, whether the companies are combined or separate

Slide 22 Indicative timetable for the offer 2008 Offer Period Event Jul Aug Sep Oct Nov Dec Day 0 (a) Day 60 Post Day 60 Regulatory Approvals Satisfaction of regulatory approval pre-conditions Offer Documentation Posting of offer documents for Rio Tinto plc offer and Rio Tinto Ltd offer to shareholders Offer Fulfilment Last date for fulfilment of greater than 50% minimum acceptance condition in both the Rio Tinto plc and Rio Tinto Ltd offers Post Day 60 If minimum acceptance conditions are met – offer continues.  (i.e. in order to receive sufficient acceptances to enable compulsory acquisition) Notes: a) Date for Day 0 may fall in 2008 or 2009. Timetable is indicative only. (within 28 days of the preconditions being satisfied)

Slide 23 Summary • China, India and other developing economies are expected to continue to drive demand for commodities in the long-term • BHP Billiton is focused on executing its strategy, benefits of this were proven in the FY2008 result • Future production growth 6.9% is expected to be delivered from lower risk projects and high margin products • BHP Billiton is working towards completing the regulatory review process for the Rio Tinto offer by the end of 2008 • Formal offer documents will be distributed to shareholders following this • BHP Billiton believes this offer is compelling for Rio Tinto shareholders, and value enhancing for BHP Billiton shareholders Cannington

Slide 24 Questions and Answers

Slide 25 BHP Billitons’ senior management team Notes: a) Andrew Mackenzie’s appointment to BHP Billiton was announced on 20-Nov-2007, he has not yet commenced his new role at BHP Billiton. He previously worked at Rio Tinto where he was Chief Executive, Diamonds and Industrial Minerals. Chairman and Chief Executive Officer Group Management Committee Don Argus Chairman • Chairman of BHP Billiton Group since June 2001 • Chairman of BHP Limited since April 1999 Marius Kloppers Chief Executive Officer • 15 years resources experience • 15 years at BHP Billiton Marcus Randolph Chief Executive Ferrous and Coal • 31 years resources experience • 9 years at BHP Billiton • Previously worked at Rio Tinto Alex Vanselow Chief Financial Officer • 19 years resources experience • 19 years at BHP Billiton Karen Wood Chief People Officer • 7 years resources experience • 7 years at BHP Billiton Michael Yeager Chief Executive Petroleum • 27 years resources experience • 2 years at BHP Billiton Alberto Calderon Chief Commercial Officer • 9 years resources experience • 2 years at BHP Billiton Andrew Mackenzie (a) Chief Executive Non Ferrous • 30 years resources experience • Previously worked at Rio Tinto

Slide 26 More information for shareholders Internet More information on BHP Billiton or BHP Billiton’s offer for Rio Tinto can be found at either of the following web pages: BHP Billiton: www.bhpbilliton.com BHP Billiton’s offer for Rio Tinto: www.bhpbilliton.com\RioTintoOffer Or Email: investor.relations@bhpbilliton.com BHP Billiton Shareholder Information Helpline If you have any additional questions you can contact the Shareholder Information Helpline on the following numbers: Australia toll free: 1300 766 363 New Zealand toll free: 0800 668 228 For other callers: +61 3 9415 4365 BHP Billiton Shareholder Services - Computershare For information about your shareholding contact: Within Australia: 1300 656 780 Outside Australia: +61 3 9415 4020 Fax: +61 3 9473 2460