Transaction in Own Shares

BP PLC
12 October 2005

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

BP p.l.c. announces that on 11 October 2005, it purchased 5,310,000 ordinary
shares at prices between 630.50 pence and 638.50 pence per share and between
1112.3 cents and 1119.2 cents per share. The purchased shares will all be held
as Treasury shares.

Following the above purchase, BP p.l.c. holds  693,838,481  ordinary shares in
Treasury, and has 20,942,541,341 ordinary shares in issue (excluding Treasury
shares).

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


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