Transaction in Own Shares

BP PLC
23 September 2005


BP p.l.c.  -  Transaction in Own Shares
BP p.l.c.  -  23 September 2005


BP p.l.c. announces that on 22 September 2005, it purchased 7,159,200 ordinary
shares at prices between 654.50 pence and 668.00 pence per share and between
1178.83 cents and 1193.67 cents per share. The purchased shares will all be held
as Treasury shares.

Following the above purchase, BP p.l.c. holds 614,294,281 ordinary shares in
Treasury, and has 20,910,013,811 ordinary shares in issue (excluding Treasury
shares).


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


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