2023 – (Date) Paul Hemingway
2018 – 2023 Philip Osman
2015 – 2018 Michael Goodwin
2012 – 2015 Patrick Garnett
2011 – 2012 Stephen Johnson
2008 – 2011 Simon Palmer
2005 – 2008 Peter Plant
2002 – 2005 Rodney Leaper
1999 – 2002 Stephen Johnson
1996 – 1999 Diane Cottier
1993 – 1996 Stephen Bellamy
1989 – 1993 David Johnstone
1986 – 1989 Paul Harrison
1983 – 1986 Michael Blackburn
1981 – 1983 Douglas Johnson