Mayhew was a consistent advocate of Palestinian rights. In 1971, with fellow MP Dennis Walters and publisher Claud Morris, he launched a bi-monthly journal, Middle East International (MEI). The journal was funded by a foundation set up in Geneva by former ambassador Harold Beeley calling itself the Aran Non-Arab Foundation (ANAF).ANAF foundation list of board members Beeley was to become vice-chairman of MEI.Harold Beeley obituary in Guardian After a disagreement with Morris,obituary with details of disagreement, The Daily Telegraph Mathew took over as publisher and remained Chairman of MEI until his death in 1997. MEI continued to be published for a further eight years. Over its thirty-four years MEI had a number of retired British diplomats serving as directors, including James Craig and Anthony Nutting. It was described by The Jewish Chronicle as the “authoritative voice of the pro-Arab lobby”.JC 14 May 1982 p.6
