| Alastair Bradshaw | Secretary | 16 Dec 2011 | 3 Mar 2014 | - | - |
| Alexandra Dadd | Secretary | 30 Jul 2008 | 2 Feb 2009 | Other | - |
| Andrew Christopher Lewis | Director | 24 Apr 1998 | 11 Feb 2009 | British | 60 years |
| Anthony Roy Foster | Secretary | 20 Jan 2006 | 15 Feb 2008 | British | - |
| Anthony William Pidgley | Director | 1 Feb 1993 | 26 Jun 2020 | British | 78 years |
| Christopher Chittenden Hart | Director | 22 Sept 1994 | 30 Nov 1994 | American | 77 years |
| Claire Puttergill | Secretary | 31 Oct 1996 | 17 Oct 2003 | British | - |
| David Graeme Thomas | Director | 1 Feb 1993 | 31 May 1994 | British | 100 years |
| Elaine Anne Driver | Secretary | 3 Mar 2014 | 8 Aug 2016 | - | - |
| Elizabeth Taylor | Secretary | 1 Feb 2004 | 30 Sept 2005 | British | - |
| Gemma Parsons | Secretary | 8 Aug 2016 | 4 May 2018 | - | - |
| Jared Stephen Philip Cranney | Secretary | 4 May 2018 | 21 Oct 2019 | - | - |
| Jeffery Thomas Skinner | Director | 30 Nov 1994 | 8 May 2003 | British | 68 years |
| Nicolas Guy Simpkin | Director | 5 Nov 2009 | 23 Sept 2015 | British | 56 years |
| Oliver Gates | Director | 1 Feb 1993 | 30 Nov 1994 | British | 88 years |
| Paul Graham Read | Director | 1 Feb 1993 | 31 Oct 1996 | British | 78 years |
| Paul Graham Read | Secretary | 1 Feb 1993 | 31 Oct 1996 | British | - |
| Paul Mario Bak | Director | 8 Nov 1996 | 24 Apr 1998 | British | 70 years |
| Richard James Stearn | Secretary | 2 Feb 2009 | 16 Dec 2011 | British | - |
| Robert Charles Grenville Perrins | Secretary | 15 Feb 2008 | 30 Jul 2008 | British | - |
| Wendy Joan Pritchard | Secretary | 2 Jan 2004 | 1 Feb 2004 | British | - |
