EXHIBIT 13.1

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 on Form 20-F of Scottish Power plc (the “Company”) for the fiscal year ended March 31, 2006 as filed with the Securities and Exchange Commission on the date hereof (the “Report”), I, Philip Bowman, the Chief Executive Officer of the Company, hereby certify, pursuant to 18 U.S.C. Section 1350, as adopted pursuant to Section 906 of the Sarbanes-Oxley Act of 2002, to the best of my knowledge, that:

1. The Report fully complies with the requirements of Section 13(a) or 15(d) of the Securities Exchange Act of 1934; and

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

Dated: June 30, 2006

/s/ Philip Bowman

Philip Bowman

Chief Executive