Exhibit 23 Consent of Independent Auditors We consent to the incorporation by reference in the Registration Statement (Form S-8 No. 333-79399 and No. 333-9020) pertaining to the BP DirectSave Plan (formerly BP Amoco DirectSave Plan) of BP p.l.c. of our report dated June 25, 2001, with respect to the financial statements of the BP DirectSave Plan included in this Annual Report (Form 11-K) for the year ended December 31, 2000. ERNST & YOUNG LLP Chicago, Illinois June 27, 2001