Transaction in Own Shares

BP PLC
12 July 2007

BP p.l.c.  -  Transaction in Own Shares
BP p.l.c.  -  12 July 2007

BP p.l.c. announces that on 11 July 2007, it purchased for cancellation
2,000,000 ordinary shares at prices between 604.5 pence and 607.0 pence per
share.

BP p.l.c. also announces that on 11 July 2007 it transferred to participants in
its employee share schemes 5,857 ordinary shares at prices between 350.0 pence
and 500.0 pence. These shares were previously held as treasury shares.

Following the above transactions, BP p.l.c. holds 1,943,732,522 ordinary shares
in Treasury, and has 19,119,106,780 ordinary shares in issue (excluding Treasury
shares).


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


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