| Adrian Bird | Director | 1 Apr 2007 | 30 Sept 2010 | British | 79 years |
| Alexander Ian Macgregor | Secretary | 13 Mar 1992 | 13 Dec 1996 | British | - |
| Andrew Cossar | Secretary | 1 Feb 2012 | 17 Sept 2012 | - | - |
| Christopher Edwards | Director | 1 Apr 1994 | 31 Mar 2005 | British | 84 years |
| David James Scott Cooksey | Director | 19 Jul 1995 | 31 Dec 1999 | British | 86 years |
| David John Weatherall | Director | 13 Mar 1992 | 31 Dec 2000 | British | 93 years |
| Dianne Hayter | Secretary | 13 Dec 1996 | 30 Jul 1999 | British | - |
| Dominic Cadbury | Director | 10 Nov 1999 | 30 Apr 2006 | British | 86 years |
| Eleanor Boddington | Secretary | 29 Apr 2016 | 20 Oct 2016 | - | - |
| Eleanor Nancie Boddington | Director | 29 Apr 2016 | 20 Oct 2016 | British | 58 years |
| Hans Leo Kornberg | Director | 13 Mar 1992 | 14 Jan 1995 | British | 98 years |
| James Julian Bennett Jack | Director | 13 Mar 1992 | 31 Mar 2004 | New Zealand | 90 years |
| John Bertrand Gurdon | Director | 16 Jan 1995 | 30 Sept 2000 | British | 93 years |
| John Gillespie Stewart | Secretary | 30 Jul 1999 | 31 Jan 2012 | Usa | - |
| Kay Elizabeth Davies | Director | 1 Oct 2013 | 30 Sept 2015 | English | 75 years |
| Martin Bobrow | Director | 1 Oct 1996 | 31 Mar 2007 | British | 88 years |
| Michael Llewellyn Rutter | Director | 1 Oct 1996 | 31 Mar 2004 | British | 93 years |
| Peter Grenville Cazalet | Director | 13 Mar 1992 | 26 Feb 1996 | British | 97 years |
| Peter William Jack Rigby | Director | 1 Oct 2010 | 30 Sept 2013 | British | 79 years |
| Roger Geoffrey Gibbs | Director | 13 Mar 1992 | 31 Dec 1999 | British | 92 years |
| Roy Malcolm Anderson | Director | 13 Mar 1992 | 9 May 2000 | British | 79 years |
| Susan Jean Wallcraft | Secretary | 17 Sept 2012 | 29 Apr 2016 | - | - |
| Susan Jean Wallcraft | Director | 1 Oct 2015 | 29 Apr 2016 | British | 60 years |
| Timothy James Livett | Director | 1 Oct 2015 | 31 Dec 2018 | British | 64 years |
| William Martin Castell | Director | 1 May 2006 | 30 Sept 2015 | British | 79 years |
| William Stanley Peart | Director | 13 Mar 1992 | 31 Mar 1994 | British | 104 years |