Transaction in Own Shares

Rio Tinto PLC
25 April 2006





Rio Tinto plc today acquired through JPMorgan Cazenove Limited 200,000 of its
ordinary shares at an average price of 3122.1893 pence per ordinary share. The
purchased shares will all be held as treasury shares.



Following the above purchase, Rio Tinto plc holds 12,493,717 ordinary shares as
treasury shares. The total number of ordinary shares in issue (excluding shares
held as treasury shares) is 1,059,751,760.



For further information, please contact:

Investor Relations

Nigel Jone

Office: [phone]

Mobile: [phone]

Secretarial Department

Matthew Whyte

Office: [phone]

Website: www.riotinto.com




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