Transaction in Own Shares

BP PLC
28 June 2007


BP p.l.c. - Transaction in Own Shares
BP p.l.c. - 28 June 2007

BP p.l.c. announces that on 27 June 2007, it purchased for cancellation
2,635,000 ordinary shares at prices between 587.0 pence and 590.0 pence per
share.

BP p.l.c. also announces that on 27 June 2007 it transferred to participants in
its employee share schemes 60,408 ordinary shares at prices between 350.0 pence
and 500.0 pence. These shares were previously held as treasury shares.

Following the above transactions, BP p.l.c. holds 1,943,757,560 ordinary shares
in Treasury, and has 19,128,916,463 ordinary shares in issue (excluding Treasury
shares).

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



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