Transaction in Own Shares

BP PLC
06 October 2005

BP p.l.c.  -  Transaction in Own Shares
BP p.l.c.  -  06 October 2005

BP p.l.c. announces that on 5 October 2005, it purchased 7,938,000 ordinary
shares at prices between 637.50 pence and 646.50 pence per share and between
1107.2 cents and 1120.0 cents per share. The purchased shares will all be held
as Treasury shares.

Following the above purchase, BP p.l.c. holds 670,920,481 ordinary shares in
Treasury, and has 20,965,040,549 ordinary shares in issue (excluding Treasury
shares).

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


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