Transaction in Own Shares

BP PLC
22 August 2007




BP p.l.c.  -  Transaction in Own Shares
BP p.l.c.  -  22 August 2007


BP p.l.c. announces that on 21 August 2007, it purchased for cancellation
1,870,000 ordinary shares at prices between 535.0 pence and 544.0 pence per
share.

Following the above transactions, BP p.l.c. holds 1,943,688,916 ordinary shares
in Treasury, and has 19,063,422,601 ordinary shares in issue (excluding Treasury
shares).


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




                      This information is provided by RNS
            The company news service from the London Stock Exchange