Transaction in Own Shares

BP PLC
12 July 2005

BP p.l.c.  -  Transaction in Own Shares
BP p.l.c.  -  12 July 2005

BP p.l.c. announces that on 11 July 2005, it purchased 9,000,000 ordinary shares
at prices between 632.00 pence and 638.00 pence per share. The purchased shares
will all be held as Treasury shares.

Following the above purchase, BP p.l.c. holds 352,845,724 ordinary shares in
Treasury, and has 21,145,312,869 ordinary shares in issue (excluding Treasury
shares).

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


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