Transaction in Own Shares

BP PLC
10 May 2006

BP p.l.c.  -  Transaction in Own Shares
BP p.l.c.  -  10 May 2006

BP p.l.c. announces that on 9 May 2006, it purchased 9,350,000 ordinary shares
at prices between 676.0 pence and 684.0 pence per share and between 1263.5 cents
and 1271.7 cents per share. The purchased shares will all be held as Treasury
shares.

Following the above transactions, BP p.l.c. holds 1,488,882,390 ordinary shares
in Treasury, and has 20,202,984,090 ordinary shares in issue (excluding Treasury
shares).

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


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