Transaction in Own Shares

BP PLC
27 September 2007


BP p.l.c. - Transaction in Own Shares
BP p.l.c. - 27 September 2007

BP p.l.c. announces that on 26 September 2007, it purchased for cancellation
2,225,000 ordinary shares at prices between 565.50 pence and 573.00 pence per
share.

BP p.l.c. also announces that on 26 September 2007 it transferred to
participants in its employee share schemes 101,572 ordinary shares at prices
between 350.00 pence and 500.00 pence. These shares were previously held as
treasury shares.

Following the above transactions BP p.l.c. holds 1,941,749,455 ordinary shares
in Treasury, and has 19,018,354,275 ordinary shares in issue (excluding Treasury
shares).

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



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