Transaction in Own Shares

BP PLC
05 August 2005


BP p.l.c. - Transaction in Own Shares
BP p.l.c. - 5 August 2005

BP p.l.c. announces that on 4 August 2005, it purchased 9,150,000 ordinary
shares at prices between 637.00 pence and 642.00 pence per share and between
1132.17 cents and 1143.83 cents per share. The purchased shares will all be held
as Treasury shares.

Following the above purchase, BP p.l.c. holds 514,997,724 ordinary shares in
Treasury, and has 20,988,504,857 ordinary shares in issue (excluding Treasury
shares).

Enquiries: Fergus MacLeod, BP p.l.c. Tel : [phone]



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