Transaction in Own Shares

BP PLC
09 August 2005

BP p.l.c.  -  Transaction in Own Shares

BP p.l.c.  -  9 August 2005

BP p.l.c. announces that on 8 August 2005, it purchased 5,023,060 ordinary
shares at prices between 638.00 pence and 648.00 pence per share and between
1152.00 cents and 1160.00 cents per share. The purchased shares will all be held
as Treasury shares.

Following the above purchase, BP p.l.c. holds 525,750,784 ordinary shares in
Treasury, and has 20,979,091,651 ordinary shares in issue (excluding Treasury
shares).

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


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