Exhibit 5.2

                         [LETTERHEAD OF BP AMERICA INC.]

November 3, 2003

BP Capital Markets America Inc.             BP Capital Markets p.l.c.
4101 Winfield Road                          Breakspear Park
Warrenville, Illinois 60555                 Breakspear Way
                                            Hernel Hempstead
                                            Herts HP2 4UL England

BP p.l.c.
1 St. James's Square
London SW1Y 4PD England

BP Canada Finance Company                   BP Australia Capital Markets Limited
240 - 4th Avenue, S.W.                      (CAN 006 507 768)
Calgary, Alberta                            Level 29, The Tower
Canada, T2P 4H4                             Melbourne Central
                                            360 Elizabeth Street
                                            Melbourne 3000 Australia

Ladies and Gentlemen:

In connection with the registration under the Securities Act of 1933, as amended
(the "Act"), of (i) guaranteed debt securities (the "Securities") of BP Capital
Markets America Inc., a Delaware corporation (the "Company"); (ii) the
guaranteed debt securities (the "Affiliate Securities") of BP Australia Capital
Markets Limited, BP Capital Markets p.l.c., and BP Canada Finance Company
(collectively, the "Affiliates", and each, an "Affiliate"), and (iii) the
guarantees (the "Guarantees") of the Securities by BP p.l.c., an English
corporation ("BP"); as counsel to the Company, and US counsel to BP and the
Affiliates, I have examined such corporate records, certificates and other
documents and such questions of law as I have considered necessary or
appropriate for the purposes of this opinion.

Upon the basis of such examination, I advise you that, in my opinion:

     (1)     The Company is a corporation validly existing and in good standing
             under the laws of the State of Delaware.

     (2)     When the Registration Statement has become effective under the Act,
             the terms of the Securities and of their issue and sale have been
             duly established in conformity with




             the Indenture relating to the Securities so as not to violate any
             applicable law or breach of any agreement binding upon the Company,
             the terms of the Guarantees have been duly established in
             conformity with the Indenture relating to the Securities, the
             Securities have been duly executed and authenticated in accordance
             with the Indenture relating to the Securities, the Guarantees have
             been endorsed on the Securities and executed as contemplated in the
             Indenture relating to the Securities, and the Securities have been
             issued and sold as contemplated in the Registration Statement:

             (a) the Securities will constitute valid and legally binding
             obligations of the Company, and

             (b) the Guarantees will constitute valid and legally binding
             obligations of BP,

             subject in each case to bankruptcy, insolvency, fraudulent
             transfer, reorganization, moratorium and similar laws of general
             applicability relating to or affecting creditor's rights and to
             general equity principles.

     (3)     When the Registration Statement has become effective under the Act,
             the terms of the Affiliate Securities and of their issue and sale
             have been duly established in conformity with the Indenture
             relating to the Affiliate Securities so as not to violate any
             applicable law or breach of any agreement binding upon the
             Affiliate issuing such Affiliate Securities, the terms of the
             Guarantees have been duly established in conformity with the
             Indenture relating to the Affiliate Securities, the Affiliate
             Securities have been duly executed and authenticated in accordance
             with such Indenture, the Guarantees have been endorsed on the
             Affiliate Securities and executed as contemplated in such
             Indenture, and the Affiliate Securities have been issued and sold
             as contemplated in the Registration Statement, and, only in the
             case of the Affiliate Securities of BP Australia Capital Markets
             Limited, the Indenture relating to the Affiliate Securities has
             been duly executed and delivered, the Affiliate Securities will
             constitute valid and legally binding obligations of the Affiliate
             issuing such Affiliate Securities, subject, in each case to
             bankruptcy, insolvency, fraudulent transfer, reorganization,
             moratorium and similar laws of general applicability relating to or
             affecting creditor's rights and to general equity principles.

In rendering the opinions in paragraphs (2)(b) and (3) above, I have, with your
approval,

     (i)     relied as to all matters governed by the laws of England upon the
             opinions of P.B.P. Bevan delivered to BP and BP Capital Markets
             p.l.c. on this date,
     (ii)    relied as to all matters governed by the laws of Australia upon the
             opinion of R.W. Venner delivered to BP Capital Markets Australia
             Limited on this date,
     (iii)   relied as to all matters governed by the laws of Canada or Nova
             Scotia on the opinion of F. Swanson delivered to BP Canada Finance
             Company on this date.

I hereby consent to the filing of this opinion as an exhibit to the Registration
Statement and to the references to me under the heading "Validity of Securities"
in the Prospectus. In giving such




consent, I do not admit that I am within the category of persons whose consent
is required under Section 7 of the Act.

Very truly yours,

  /s/ D.B. Pinkert
- -------------------------
D.B. Pinkert
Assistant General Counsel
BP America Inc.