| Andrew Christopher Bolter | Director | 11 Jul 2003 | 1 Dec 2005 | British | 56 years |
| Andrew James Harrower Dougal | Director | 21 Nov 1991 | 1 Nov 1993 | British | 75 years |
| Andrew James Harrower Dougal | Secretary | 21 Nov 1991 | 21 Apr 1992 | British | - |
| Andrew Timothy Smith | Director | 16 Jul 2001 | 31 Dec 2004 | British | 67 years |
| Anthony Ross Cotton | Director | 21 Nov 1991 | 14 Oct 1993 | British | 83 years |
| Barry Dennett | Director | 1 Dec 2004 | 31 Dec 2004 | British | 79 years |
| Benjamin John Guyatt | Director | 30 Dec 2009 | 1 Jun 2011 | British | 51 years |
| Carsten Matthias Wendt | Director | 1 Dec 2016 | 26 Oct 2021 | German | 50 years |
| Christian Leclercq | Director | 2 Jun 2008 | 31 Mar 2010 | Belgian | 61 years |
| David Charles Aspinall | Director | 14 Mar 1996 | 3 Feb 1997 | British | 82 years |
| David John Egan | Director | 1 Jun 2007 | 16 Jun 2008 | British | 59 years |
| David John Snowdon | Director | 1 Nov 1993 | 29 Mar 1996 | British | 82 years |
| David Jonathan Clarke | Director | 1 Jun 2011 | 1 Dec 2016 | British | 52 years |
| Gary Charles Mcardle | Director | 18 Aug 2006 | 16 Jun 2008 | British | 66 years |
| Graham Dransfield | Director | 11 Jul 2003 | 30 Jun 2008 | British | 75 years |
| Graham Dransfield | Secretary | 10 Dec 2007 | 30 Jun 2008 | British | - |
| Ian Alan Duncan Peters | Director | 1 Oct 2000 | 11 Jul 2003 | British | 61 years |
| Ian Alan Duncan Peters | Secretary | 1 Dec 2000 | 11 Jul 2003 | British | - |
| Ian Paul Tyler | Director | 1 Nov 1993 | 29 Mar 1996 | British | 66 years |
| Ian Paul Tyler | Secretary | 1 Nov 1993 | 29 Mar 1996 | British | - |
| John Charles Meins | Director | 1 Nov 1993 | 31 Dec 1999 | British | 87 years |
| Marilyn Jane Phillips | Director | 4 Jul 1997 | 16 Jul 2001 | British | 65 years |
| Nicholas Swift | Director | 11 Jul 2003 | 1 Jun 2007 | British | 62 years |
| Paul Derek Tunnacliffe | Secretary | 11 Jul 2003 | 10 Dec 2007 | British | - |
| Richard Antony Bruce Varcoe | Director | 31 Oct 1997 | 1 Dec 2000 | British | 67 years |
| Richard Antony Bruce Varcoe | Secretary | 31 Oct 1997 | 1 Dec 2000 | British | - |
| Richard Robert Gimmler | Director | 13 Jun 2008 | 30 Dec 2009 | British | 59 years |
| Robert Ian Menzies-gow | Director | 21 Nov 1991 | 30 Apr 1993 | British | 84 years |
| Roger Thomas Virley Tyson | Secretary | 31 Jul 2008 | 10 Mar 2016 | British | - |
| Ruth Coulson | Director | 1 Dec 2005 | 20 Jun 2008 | Australian | 53 years |
| Seyda Pirinccioglu | Director | 19 Jul 2010 | 31 Aug 2013 | Turkish | 55 years |
| Simon John Russell | Director | 3 Feb 1997 | 4 Jul 1997 | British | 75 years |
| Simon Neil Vivian | Director | 21 Apr 1992 | 30 Jun 2003 | British | 69 years |
| Simon Neil Vivian | Secretary | 21 Apr 1992 | 1 Nov 1993 | British | - |
| Simon Roger Fernley | Director | 29 Mar 1996 | 31 Oct 1997 | British | 76 years |
| Simon Roger Fernley | Secretary | 29 Mar 1996 | 31 Oct 1997 | British | - |