1928-1944 Edward James Avory
1945-1953 Lancelot C. Bullock
1954-1955 Alex Marston
1956-1967 Berthil W. Gregory
1968-1988 Trevor Smith
1989-1992 Simon Hodgson
1993-1998 Tony Longman
1999-2010 Darrell Hinds
2010-2015 Peter Smith