Transaction in Own Shares

BP PLC
11 September 2007


BP p.l.c. - Transaction in Own Shares
BP p.l.c. - 11 September 2007

BP p.l.c. announces that on 10 September 2007, it purchased for cancellation
2,190,000 ordinary shares at prices between 556.50 pence and 565.50 pence per
share.

BP p.l.c. also announces that on 10 September 2007 it transferred to
participants in its employee share schemes 332,027 ordinary shares at prices
between 386.0 pence and 452.0 pence. These shares were previously held as
treasury shares.

Following the above transactions, BP p.l.c. holds 1,942,142,012 ordinary shares
in Treasury, and has 19,041,344,663 ordinary shares in issue (excluding Treasury
shares).

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




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