Transaction in Own Shares

BP PLC
21 September 2004


BP p.l.c. - Transaction in Own Shares
BP p.l.c. - 21 September 2004

BP p.l.c. announces that on 20 September 2004, it purchased for cancellation
10,613,400 ordinary shares at prices between 520.5 pence and 531.0 pence per
share and between 946.2 US cents and 951.0 US cents per share.

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



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