Transaction in Own Shares

BP PLC
26 September 2005


BP p.l.c. - Transaction in Own Shares
BP p.l.c. - 26 September 2005

BP p.l.c. announces that on 23 September 2005, it purchased 7,376,200 ordinary
shares at prices between 657.00 pence and 662.50 pence per share and between
1173.67 cents and 1176.67 cents per share. The purchased shares will all be held
as Treasury shares.

Following the above purchase, BP p.l.c. holds 621,670,481 ordinary shares in
Treasury, and has 21,011,952,905 ordinary shares in issue (excluding Treasury
shares).

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



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