Transaction in Own Shares

Rio Tinto PLC
10 March 2006

Rio Tinto plc today acquired through JPMorgan Cazenove Limited 115,000 of its
ordinary shares at an average price of 2591.0333 pence per ordinary share. The
purchased shares will all be held as treasury shares.

Following the above purchase, Rio Tinto plc holds 10,811,557 ordinary shares as
treasury shares. The total number of ordinary shares in issue (excluding shares
held as treasury shares) is 1,061,413,991.

For further information, please contact:

Investor Relations

Nigel Jones

Office: [phone]

Mobile: [phone]

Secretarial Department

Matthew Whyte

Office: [phone]

Website: www.riotinto.com




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