 He was a keen sportsman and played football for the university Football Club as well as for Oxford City Football Club.At the National Physical Laboratory he was club tennis champion and captain of the cricket team, he also distinguished himself as a sprinter in the civil service championships.Fox, who had enjoyed good health up to 1981, suffered from heart problems during his retirement and died from a ruptured aneurysm in the John Radcliffe Hospital, Oxford in 1992.