ICO Global Communications Ltd. appointed the WPP Group, the London-based international marketing communications conglomerate, to head up its worldwide public relations effort. WPP Group and its subsidiaries also will assist internal communications between ICO’s 47 investors, create an ICO website and intranet for internal exchanges, and help define ICO’s “corporate identity.” WPP Group, with annual revenues of $15.4 billion, includes Hill and Knowlton and the J. Walter Thompson Co. (ICO, Phone: 011/44 171/728- 1256.)