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 of WPP plc (the “Company”) on Form 20-F for the period ended 31 December 2022 (the “Report”), I, Mark Read, Chief Executive Officer of the Company, certify to my knowledge, pursuant to 18 U.S.C. Section 1350, as adopted pursuant to Section 906 of the Sarbanes-Oxley Act of 2002, 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 contained in the Report fairly presents, in all material respects, the Company’s financial

position and results of operations.

Date: 23 March 2023

/s/ Mark Read

Mark Read

Chief Executive Officer

(principal executive officer)