| Andrew Christopher Bolter | Director | 28 May 2003 | 1 Dec 2005 | British | 55 years |
| Anthony George Laurence Alexander | Director | 6 Aug 1991 | 30 Jun 1995 | British | 87 years |
| Benjamin John Guyatt | Director | 13 Jun 2008 | 1 Jun 2011 | British | 50 years |
| Carsten Matthias Wendt | Director | 1 Dec 2016 | 23 Nov 2021 | German | 49 years |
| Christian Leclercq | Director | 2 Jun 2008 | 31 Mar 2010 | Belgian | 60 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 |
| Derek Charles Bonham | Director | 6 Aug 1991 | 24 Sept 1993 | British | 82 years |
| Graham Dransfield | Director | 6 Aug 1991 | 30 Jun 2008 | British | 74 years |
| Graham Dransfield | Secretary | 10 Dec 2007 | 30 Jun 2008 | British | - |
| John Edward Douglas Stevart | Director | 18 Feb 1992 | 9 Jul 1993 | British | 81 years |
| Justin Richard Read | Director | 22 Oct 1999 | 28 May 2003 | British | 64 years |
| Kenneth John Ludlam | Director | 9 Jul 1993 | 28 May 2003 | British | 82 years |
| Martin Charles Murray | Director | 6 Aug 1991 | 30 Sept 1996 | British | 70 years |
| Nicholas Swift | Director | 28 May 2003 | 1 Jun 2007 | British | 61 years |
| Paul Derek Tunnacliffe | Secretary | 1 Oct 1996 | 10 Dec 2007 | British | - |
| Richard Robert Gimmler | Director | 13 Jun 2008 | 30 Dec 2009 | British | 58 years |
| Roger Thomas Virley Tyson | Secretary | 31 Jul 2008 | 10 Mar 2016 | British | - |
| Roger Thomas Virley Tyson | Secretary | 6 Aug 1991 | 30 Sept 1996 | British | - |
| Ruth Coulson | Director | 1 Dec 2005 | 20 Jun 2008 | Australian | 52 years |
| Samantha Jane Hurrell | Director | 30 Sept 1996 | 22 Oct 1999 | British | 62 years |
| Seyda Pirinccioglu | Director | 19 Jul 2010 | 31 Aug 2013 | Turkish | 54 years |