| Aaron Klug | Director | 11 Dec 1991 | 3 Feb 2006 | British | 99 years |
| Adrian Charles Noel Kemp | Director | 20 Dec 2013 | 1 May 2025 | British | 59 years |
| Adrian Charles Noel Kemp | Secretary | 22 Sept 2006 | 19 Oct 2007 | British | - |
| Adrian Charles Noel Kemp | Secretary | 22 Sept 2006 | 19 Oct 2007 | British | - |
| Ake Bo Tage Stavling | Director | 2 Dec 2002 | 3 Feb 2006 | Swedish | 80 years |
| Alistair Cameron David Cumming | Director | 1 Mar 1998 | 29 Nov 1998 | British | 91 years |
| Andrew James Williams | Director | 30 Apr 2010 | 31 Dec 2013 | British | 61 years |
| Anthony Michael Nixon | Secretary | 1 Mar 1992 | 12 Dec 1997 | British | - |
| Bahija Jallal | Director | 30 Apr 2010 | 31 Dec 2013 | Usa | 64 years |
| Christopher John Marshall | Director | 24 Sept 2004 | 3 Feb 2006 | British | 76 years |
| Claire-marie O'grady | Director | 20 Dec 2013 | 31 Jul 2015 | British | 57 years |
| Claire-marie O'grady | Secretary | 25 Oct 2013 | 31 Jul 2015 | - | - |
| David Chiswell | Director | 19 Dec 1995 | 31 Mar 2002 | British | 72 years |
| David Roy Glover | Director | 11 Jul 1997 | 4 Feb 2005 | British | 73 years |
| Diane Mellett | Director | 4 Feb 2005 | 22 Sept 2006 | British | 65 years |
| Diane Mellett | Secretary | 12 Dec 1997 | 31 Mar 2005 | British | - |
| Edward Conor Johnston | Secretary | 1 Feb 2008 | 21 Aug 2012 | British | - |
| Edward Daryl Codd | Director | 11 Dec 1991 | 28 Apr 1995 | New Zealander | 79 years |
| Edward Daryl Codd | Director | 28 Apr 1995 | 28 Apr 1995 | New Zealander | 79 years |
| Edward Highton Harden | Secretary | 11 Dec 1991 | 1 Mar 1992 | British | - |
| Eigil Neilsen | Director | 11 Dec 1991 | 8 Dec 1995 | Danish | 88 years |
| Geoffrey Walter Grigg | Director | 11 Dec 1991 | 18 Jun 1996 | Australian | 99 years |
| Gregory Paul Winter | Director | 13 Sept 1994 | 10 May 1996 | British | 74 years |
| Hamish Cameron | Director | 22 Jun 2006 | 13 Jul 2007 | British | 71 years |
| Ian Martin David Brimicombe | Director | 20 Dec 2013 | 31 May 2017 | British | 62 years |
| James L Foght | Director | 4 Nov 1996 | 7 Feb 2003 | American | 89 years |
| Jan Magnus Lundberg | Director | 22 Jun 2006 | 1 Feb 2008 | Swedish | 72 years |
| Jane Katharine Osbourn | Director | 14 Jul 2008 | 31 Dec 2013 | British | 59 years |
| John Christopher Aston | Director | 2 Sept 1996 | 22 Sept 2006 | British | 71 years |
| John Frederick Stageman | Director | 1 Feb 2008 | 14 Jul 2008 | British | 75 years |
| John Robert Brown | Director | 12 Sept 2005 | 3 Feb 2006 | British | 70 years |
| John Simon Patterson | Director | 22 Jun 2006 | 11 Sept 2007 | British | 77 years |
| John Wilcox Stocker | Director | 5 Mar 1995 | 3 Feb 2006 | Australian | 80 years |
| Jonathan Richard Symonds | Director | 22 Jun 2006 | 27 Jul 2007 | British | 66 years |
| Justin Wilbert Hoskins | Secretary | 31 Mar 2005 | 22 Sept 2006 | British | - |
| Justin Wilbert Hoskins | Director | 11 Sept 2007 | 30 Apr 2010 | British | 54 years |
| Katie Louise Jackson-turner | Director | 15 Jul 2015 | 27 Feb 2019 | British | 59 years |
| Katie Louise Jackson-turner | Secretary | 15 Jul 2015 | 18 Jan 2017 | - | - |
| Kevin Stuart Johnson | Director | 11 Jul 1997 | 19 Jun 2003 | British | 65 years |
| Matthew Ian Conacher | Secretary | 18 Jan 2017 | 16 Sept 2019 | - | - |
| Natalie Fishburn | Director | 29 Jun 2024 | 29 Nov 2024 | Australian | 49 years |
| Paul Anthony Nicholson | Director | 6 Feb 1999 | 3 Feb 2006 | British | 88 years |
| Paul Bernard Harper | Director | 1 Mar 1995 | 2 Jan 1996 | British | 79 years |
| Paul Hamilton Hookway | Director | 18 Jun 1996 | 11 Nov 1996 | Australian | 92 years |
| Peter Alan Chambre | Director | 8 Apr 2002 | 30 Jun 2006 | British | 70 years |
| Peter Alec Kiener | Director | 1 Feb 2008 | 4 Sept 2009 | British | 73 years |
| Peter Bryan Garland | Director | 11 Dec 1991 | 30 Jan 2004 | British | 91 years |
| Peter Stuart Ringrose | Director | 10 Feb 2003 | 3 Feb 2006 | British | 80 years |
| Roger Aston | Director | 12 Mar 1996 | 18 Jun 1996 | British | 69 years |
| Roger Aston | Director | 18 Jun 1996 | 31 Dec 1997 | British | 69 years |
| Stuart T Weisbrod | Director | 7 Jun 1996 | 30 Sept 1998 | Usa | 71 years |
| Uwe Bicker | Director | 6 Feb 1999 | 3 Feb 2006 | German | 80 years |
| William Charles Bertrand | Director | 11 Sept 2007 | 1 Feb 2008 | American | 61 years |
| William Charles Bertrand | Secretary | 19 Oct 2007 | 26 Apr 2013 | American | - |