| Amanda Dawn Lancaster | Secretary | 4 Mar 2005 | 28 Jul 2006 | British | - |
| Benjamin John Guyatt | Director | 30 Nov 2009 | 1 Jun 2011 | British | 50 years |
| Carsten Matthias Wendt | Director | 1 Dec 2016 | 6 Sept 2021 | German | 49 years |
| Christian Leclercq | Director | 2 Jun 2008 | 31 Mar 2010 | Belgian | 60 years |
| Christopher Brown | Director | 1 Dec 2003 | 19 Jun 2006 | British | 68 years |
| Christopher Gordon Beenham | Director | 15 Nov 1996 | 30 Jun 1999 | British | 83 years |
| David Arnold Trapnell | Director | 15 Nov 1996 | 1 Jan 2000 | British | 80 years |
| David John Anthony Musgrave | Director | 11 Nov 1992 | 15 Nov 1996 | British | 78 years |
| David John Anthony Musgrave | Secretary | 15 Nov 1996 | 13 Jul 2000 | British | - |
| David John Evans | Director | 1 Jan 2000 | 7 Mar 2005 | British | 74 years |
| David John Evans | Secretary | 13 Jul 2000 | 7 Mar 2005 | British | - |
| David John Szymanski | Director | 4 Mar 2005 | 30 Nov 2009 | British | 71 years |
| David Jonathan Clarke | Director | 1 Jun 2011 | 1 Dec 2016 | British | 51 years |
| Edward Joseph Turner | Director | 1 Jan 2000 | 30 Jun 2000 | British | 86 years |
| Geoffrey Lampard | Director | 1 Jan 2000 | 10 Dec 2003 | British | 82 years |
| Graham Dransfield | Director | 28 Jul 2006 | 30 Jun 2008 | British | 74 years |
| Graham Dransfield | Secretary | 10 Dec 2007 | 30 Jun 2008 | British | - |
| Ian Paul Aspley | Director | 1 Jan 2000 | 7 Mar 2005 | British | 70 years |
| James Toal | Director | 1 Sept 2000 | 7 Mar 2005 | British | 71 years |
| Jean Prosper Pierre Beeckman | Director | 14 Jun 2000 | 9 May 2003 | Belgian | 87 years |
| John Haydn Sinfield | Director | 1 Sept 2000 | 28 Mar 2003 | British | 60 years |
| Jonathan David Cook | Director | 13 Jun 2008 | 30 Nov 2009 | British | 48 years |
| Jozef Alfons Peeters | Director | 9 May 2003 | 7 Mar 2005 | Belgian | 77 years |
| Keith James Arnold | Secretary | 29 May 1991 | 15 Nov 1996 | British | - |
| Kenneth Charles Sharp | Director | 14 Jun 2000 | 7 Mar 2005 | British | 76 years |
| Marc Nolet De Brauwere | Director | 1 Apr 2004 | 7 Mar 2005 | British | 68 years |
| Martin John Turner | Director | 1 Jan 2000 | 7 Mar 2005 | British | 71 years |
| Michael Leslie Roberts | Director | 1 Jan 2000 | 7 Mar 2005 | British | 77 years |
| Paul Derek Tunnacliffe | Secretary | 28 Jul 2006 | 10 Dec 2007 | British | - |
| Phillip Alan Sorensen | Director | 29 May 1991 | 11 Nov 1992 | British | 79 years |
| Richard Robert Gimmler | Director | 1 Oct 2005 | 16 Jun 2008 | British | 58 years |
| Robert Erskine Beveridge | Director | 29 May 1991 | 1 Jan 2000 | British | 84 years |
| Robert Wood | Director | 4 Mar 2005 | 30 Sept 2005 | British | 59 years |
| Roger Thomas Virley Tyson | Secretary | 31 Jul 2008 | 10 Mar 2016 | British | - |
| Seyda Pirinccioglu | Director | 19 Jul 2010 | 31 Aug 2013 | Turkish | 54 years |
| Wendy Jane Trott | Director | 4 Mar 2005 | 24 Dec 2008 | British | 59 years |