George William Baker: 1975 - 1977

Donald King Middleton: 1977 -1982

Arthur John Collins: 1982 -1986

Michael Edward Howell: 1986 - 1989

Edward John Sharland: 1989 - 1991

John Westgarth Guy: 1991 - 1994

Brian Buik Low: 1994 - 1997

Charles Drace-Francis: 1997 -2000

Simon Mansfield Scaddan: 2000 -2003

David Scott Gordon-Macleod: 2003 - 2007

David Dunn: 2007 - present