Exhibit 99.1 LETTER TO COMMISSION PURSUANT TO TEMPORARY NOTE A-T2 WPP Group plc 27 Farm Street London W1J 5RJ, England June 13, 2002 Securities and Exchange Commission 450 Fifth Street, N.W. Washington, D.C. 20549 - 0408 Ladies and Gentlemen: WPP Group plc ("WPP") has received a representation letter from Arthur Andersen LLP ("Andersen"),WPP's independent public accountants, in connection with the issuance of Andersen's audit report incorporated by reference in WPP's Annual Report on this Form 20-F. In its letter, Andersen has represented to WPP that its audit of the consolidated financial statements of WPP referenced in its audit report was subject to Andersen's quality control system for the U.S. accounting and auditing practice to provide reasonable assurance that the engagement was conducted in compliance with professional standards, that there was appropriate continuity of Andersen personnel working on the audit, availability of national office consultation and availability of personnel at foreign affiliates of Andersen to conduct the relevant portions of the audit. Very truly yours, WPP Group plc By: /s/ Paul W G Richardson ----------------------- Paul W G Richardson Group Finance Director