Transaction in Own Shares

BP PLC
27 October 2005


BP p.l.c. - Transaction in Own Shares
BP p.l.c. - 27 October 2005

BP p.l.c. announces that on 26 October 2005, it purchased 9,562,000 ordinary
shares at prices between 620.50 pence and 627.00 pence per share and between
1099.2 cents and 1115.8 cents per share. The purchased shares will all be held
as Treasury shares.

BP p.l.c. also announces that on 26 October 2005 it transferred to participants
in its employee share schemes 12,484 ordinary shares at prices between 350.00
pence and 498.00 pence. These shares were previously held as treasury shares.

Following the above transactions, BP p.l.c. holds 753,645,950 ordinary shares in
Treasury, and has 20,883,036,123 ordinary shares in issue (excluding Treasury
shares).

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



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