Transaction in Own Shares

BP PLC
21 March 2005



BP p.l.c.  -  Transaction in Own Shares

BP p.l.c.  -  21 March 2005



BP p.l.c. announces that on 18 March 2005, it purchased 3,700,000 ordinary
shares at prices between 561.00 pence and 567.00 pence per share. The purchased
shares will all be held as Treasury shares.



Following the above purchase, BP p.l.c. holds  104,550,000  ordinary shares in
Treasury, and has 21,377,707,611  ordinary shares in issue (excluding Treasury
shares).



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


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