Best man at the Royal wedding. A new picture of the 28-year-old third Marquess of Milford Haven, OBE, DSC, who will be best man to Lt Philip Mountbatten, Royal Navy, at his wedding to Her Royal Highness Princess Elizabeth at Westminster Abbey on 20 November. He and the Royal bridegroom are first cousins and have been close friends since boyhood. Both are nephews of Viscount Mountbatten of Burma. The Marquess was educated at the Royal Naval College, Dartmouth and entered the Royal Navy as a midshipman in 1937. His London residence is at Kensington Palace. Photo shows, the Marquess of Milford Haven pictured informally at his desk in his study at Kensington Palace. 26 October 1947