EXHIBIT 13

                            CERTIFICATION PURSUANT TO
                             18 U.S.C. SECTION 1350,
                             AS ADOPTED PURSUANT TO
                  SECTION 906 OF THE SARBANES-OXLEY ACT OF 2002

    In connection with the Annual Report of The BOC Group plc (the "Company") on
Form 20-F for the period ending September 30, 2004, as filed with the Securities
and Exchange Commission on the date hereof (the "Report"), the undersigned
hereby certify that to the best of our knowledge:

     1. The Report fully complies with the requirements of Section 13(a) of the
Securities Exchange Act of 1934; and

     2. The information contained in the Report fairly presents, in all material
respects, the financial condition and results of operations of the Company.


Date: December 6, 2004                       /s/ Anthony Eric Isaac
                                             -----------------------------------
                                             Name:  Anthony Eric Isaac
                                             Title: Chief Executive


Date: December 6, 2004                       /s/ Rene Medori
                                             -----------------------------------
                                             Name:  Rene Medori
                                             Title: Group Finance Director