Transaction in Own Shares

BP PLC
31 July 2006


BP p.l.c. - Transaction in Own Shares
BP p.l.c. - 31 July 2006

BP p.l.c. announces that on 28 July 2006, it purchased 7,436,878 ordinary shares
at prices between 645.0 pence and 652.0 pence per share and between 1207.17
cents and 1216.17 cents per share. The purchased shares will all be held as
Treasury shares.

Following the above transactions, BP p.l.c. holds 1,854,084,718 ordinary shares
in Treasury, and has 19,842,260,627 ordinary shares in issue (excluding Treasury
shares).

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



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