Transaction in Own Shares

BP PLC
21 July 2006


BP p.l.c. - Transaction in Own Shares
BP p.l.c. - 21 July 2006

BP p.l.c. announces that on 20 July 2006, it purchased 8,697,600 ordinary shares
at prices between 623.5 pence and 632.5 pence per share and between 1144.33
cents and 1154.33 cents per share. The purchased shares will all be held as
Treasury shares.

Following the above transactions, BP p.l.c. holds 1,808,087,215 ordinary shares
in Treasury, and has 19,888,030,583 ordinary shares in issue (excluding Treasury
shares).

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




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