| Angela Jayne Willetts | Director | 16 May 2016 | 9 Aug 2019 | British | 65 years |
| Barry John Wakefield | Secretary | 17 Apr 2003 | 14 Feb 2005 | British | - |
| Brad Heppner | Director | 24 Jul 1998 | 13 Jul 1999 | Us | 60 years |
| Christopher William Shea | Director | 10 Jan 2005 | 14 Feb 2005 | British | 72 years |
| David Joseph Bagley | Director | 4 Feb 2003 | 20 Feb 2003 | British | - |
| David Joseph Bagley | Secretary | 1 Jan 2001 | 16 Apr 2003 | British | - |
| David Joseph Bagley | Secretary | 14 Feb 2005 | 31 Jan 2008 | British | - |
| David Mark Holland Huyton | Director | 28 Dec 2004 | 14 Feb 2005 | British | 66 years |
| Emma Louise Anderson | Secretary | 1 Nov 2008 | 12 Aug 2009 | British | - |
| Georgios Georgiou | Director | 26 Feb 2013 | 16 May 2016 | Cypriot | 54 years |
| Harold Edwin Bigler | Director | 30 May 1991 | 25 Jun 1996 | Usa | 95 years |
| Huw Thompson | Secretary | 31 Jan 2008 | 31 Oct 2008 | British | - |
| John Mccrory | Director | 30 May 1991 | 28 Dec 2004 | British | 78 years |
| John Mccrory | Secretary | 30 May 1991 | 31 Dec 2000 | British | - |
| Kathrin Lichtner | Director | 14 Feb 2005 | 15 Jan 2013 | German | 59 years |
| Larry Landry | Director | 27 Jun 1996 | 24 Jul 1998 | American | 83 years |
| Laurence Richard O'connell | Director | 29 Apr 2003 | 27 Jul 2004 | British | 68 years |
| Laurence Richard O'connell | Director | 27 Jul 2004 | 14 Feb 2005 | British | 68 years |
| Marc Francois Claude Dentand | Director | 29 Jan 2003 | 6 May 2004 | French And Swiss | 62 years |
| Mark Anthony Drugan | Director | 7 Sept 2011 | 31 Mar 2017 | British | 62 years |
| Nathan Gelber | Director | 30 May 1991 | 11 Feb 2003 | German | 79 years |
| Nicholas John Wood | Director | 29 Apr 2003 | 27 Jul 2004 | British | 61 years |
| Olav Rolf Koenig | Director | 11 Jan 2005 | 7 Sept 2011 | German | 59 years |
| Paul Andrew James Wood | Director | 1 Jul 2024 | 30 Sept 2025 | English | 49 years |
| Paul Michael Whitney | Director | 22 Sept 1999 | 28 Dec 2004 | British | 78 years |
| Paul Vernon Wright | Director | 28 Dec 2004 | 14 Feb 2005 | British | 72 years |
| Peter Mckone Seigle | Director | 30 May 1991 | 31 May 1996 | Usa | 79 years |
| Ronald Janusz Heath | Director | 31 Mar 2017 | 28 Jun 2024 | British | 75 years |
| Simon Richard Eaves | Director | 16 May 2016 | 6 Mar 2023 | Welsh | 59 years |
| Stefan Ammann | Director | 14 Feb 2005 | 27 Mar 2007 | Swiss | 58 years |
| William John Gripton | Director | 27 Mar 2007 | 16 May 2016 | British | 77 years |