Transaction in Own Shares

BP PLC
21 November 2005


BP p.l.c. - Transaction in Own Shares
BP p.l.c. - 21 November 2005

BP p.l.c. announces that on 18 November 2005, it purchased 8,132,400 ordinary
shares at prices between 639.50 pence and 648.50 pence per share and between
1108.33 cents and 1098.33 cents per share. The purchased shares will all be held
as Treasury shares.

Following the above transactions, BP p.l.c. holds 858,079,848 ordinary shares in
Treasury, and has 20,779,295,139 ordinary shares in issue (excluding Treasury
shares).

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



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