Transaction in Own Shares

BP PLC
28 June 2006

BP p.l.c.  -  Transaction in Own Shares
BP p.l.c.  -  28 June 2006

BP p.l.c. announces that on 27 June 2006, it purchased 6,241,800 ordinary shares
at prices between 612.0 pence and 619.0 pence per share and 1116.0 and 1128.2
cents per share. The purchased shares will all be held as Treasury shares.

Following the above transactions, BP p.l.c. holds 1,697,163,949 ordinary shares
in Treasury, and has 19,997,788,264 ordinary shares in issue (excluding Treasury
shares).

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


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