| Andrew Christopher Bolter | Director | 28 May 2003 | 1 Dec 2005 | British | 55 years |
| Andrew Russell Ashman | Director | 30 Sept 1996 | 31 Dec 1997 | British | 76 years |
| Andrew Russell Ashman | Secretary | 30 Sept 1996 | 31 Dec 1997 | British | - |
| Benjamin John Guyatt | Director | 13 Jun 2008 | 1 Jun 2011 | British | 50 years |
| Carsten Matthias Wendt | Director | 1 Dec 2016 | 6 Sept 2021 | German | 49 years |
| Catherine Anne Bearcroft | Director | 30 Jun 1992 | 30 Sept 1996 | British | 59 years |
| Catherine Anne Bearcroft | Secretary | 30 Jun 1992 | 30 Sept 1996 | British | - |
| Christian Leclercq | Director | 1 Sept 2008 | 31 Mar 2010 | Belgian | 60 years |
| Christopher Douglas Collins | Director | 31 Dec 1997 | 7 Aug 2001 | British | 85 years |
| David John Egan | Director | 1 Jun 2007 | 16 Jun 2008 | British | 58 years |
| David Jonathan Clarke | Director | 1 Jun 2011 | 1 Dec 2016 | British | 51 years |
| Elliot John Laurie | Director | 27 Feb 2004 | 16 Jun 2008 | British | 55 years |
| George Alexander John Murray | Director | 30 Jun 1992 | 31 Dec 1997 | British | 78 years |
| Graham Dransfield | Director | 31 Mar 1998 | 27 Feb 2004 | British | 74 years |
| Graham Dransfield | Director | 20 Mar 2006 | 30 Jun 2008 | British | 74 years |
| Graham Dransfield | Secretary | 10 Dec 2007 | 30 Jun 2008 | British | - |
| James Edward Hanson | Director | 30 Jun 1992 | 31 Dec 1997 | British | 103 years |
| Justin Richard Read | Director | 7 Aug 2001 | 28 May 2003 | British | 64 years |
| Kenneth John Ludlam | Director | 7 Aug 2001 | 28 May 2003 | British | 82 years |
| Michael Sinclair Shea | Director | 30 Jun 1992 | 31 Dec 1997 | British | 87 years |
| Nicholas Swift | Director | 28 May 2003 | 27 Feb 2004 | British | 61 years |
| Nicholas Swift | Director | 20 Mar 2006 | 1 Jun 2007 | British | 61 years |
| Paul Derek Tunnacliffe | Secretary | 31 Dec 1997 | 10 Dec 2007 | British | - |
| Richard Robert Gimmler | Director | 1 Sept 2008 | 30 Dec 2009 | British | 58 years |
| Roger Thomas Virley Tyson | Secretary | 31 Jul 2008 | 10 Mar 2016 | British | - |
| Ruth Coulson | Director | 1 Dec 2005 | 24 Apr 2006 | Australian | 52 years |
| Seyda Pirinccioglu | Director | 19 Jul 2010 | 31 Aug 2013 | Turkish | 54 years |
| Sheila Porritt | Director | 30 Jun 1992 | 15 Jun 1998 | British | 77 years |
| Stephen Park | Director | 30 Jun 1992 | 1 Dec 1992 | British | 73 years |
| Terence Nelhams-wright | Director | 30 Jun 1992 | 31 Dec 1997 | British | 85 years |
| The Lord Gordon Of Strathblane | Director | 30 Jun 1992 | 31 Dec 1997 | British | 89 years |