| Alan Denton Mortimer | Director | 17 Aug 1991 | 31 May 1996 | British | 76 years |
| Alan Denton Mortimer | Director | 30 Jan 1998 | 10 Dec 1998 | British | 76 years |
| Alasdair Douglas Culshaw | Director | 17 Aug 1991 | 30 Sept 1998 | British | 74 years |
| Alasdair Douglas Culshaw | Secretary | 17 Aug 1991 | 30 Sept 1998 | British | - |
| Alastair James Wardrop | Director | 19 Apr 1993 | 10 Dec 1998 | British | 68 years |
| Anita Valentine Sayer | Director | 19 Apr 1993 | 30 Sept 1997 | British | 70 years |
| Beverley Michelle Eagle | Director | 6 Mar 2017 | 22 Dec 2023 | British | 68 years |
| Brian Scott | Director | 29 Sept 1998 | 24 Feb 1999 | British | 80 years |
| David John Grey Mcbain | Director | 17 Aug 1991 | 5 Mar 1993 | British | 82 years |
| Elizabeth Bond | Director | 2 Jan 1997 | 10 Dec 1998 | Canadian | 69 years |
| Fabrice Brochet | Director | 1 Oct 2020 | 5 May 2021 | French | 60 years |
| Frederic Gerard Thery | Director | 7 Nov 2011 | 14 Mar 2016 | French | 56 years |
| Geoffrey Spink | Director | 17 Aug 1991 | 30 Sept 1998 | British | 77 years |
| George Barrie Reynolds | Director | 24 Feb 1999 | 19 May 2005 | British | 86 years |
| Ian Robert Stewart | Director | 10 Jun 2008 | 6 Dec 2010 | British | 67 years |
| James David Clifford Dolphin | Director | 2 Jun 1997 | 10 Dec 1998 | British | 67 years |
| Jean Michel Herrewyn | Director | 6 May 2005 | 4 Feb 2010 | French | 65 years |
| John Edward Pethers | Director | 17 Aug 1991 | 10 Dec 1998 | British | 72 years |
| Keith Stuart Rippington | Director | 17 Aug 1991 | 10 Dec 1998 | British | 70 years |
| Keith Stuart Rippington | Director | 8 Nov 2001 | 20 Jul 2006 | British | 70 years |
| Lynda Lee | Director | 19 Apr 1993 | 31 Jan 1998 | British | 67 years |
| Marianne Marie Therese Agez | Director | 19 May 2016 | 18 Jul 2017 | French | 67 years |
| Mark Dyson | Director | 6 Mar 2017 | 15 Dec 2018 | British | 65 years |
| Martyn Paul Fisher | Director | 31 Dec 2010 | 1 Oct 2023 | British | 65 years |
| Michael Walsh | Director | 17 Aug 1991 | 5 Mar 1993 | British | 86 years |
| Neil Vincent Gallagher | Director | 4 Jan 2010 | 1 Mar 2017 | British | 63 years |
| Nicholas John Charles Harris | Director | 19 Apr 1993 | 31 May 1996 | British | 66 years |
| Nicholas John Charles Harris | Director | 30 Jan 1998 | 10 Dec 1998 | British | 66 years |
| Peter Bartle Mynett Jackson | Director | 10 Dec 1998 | 30 Jun 2000 | British | 85 years |
| Philip Andrew Chattle | Director | 8 Nov 2001 | 1 Oct 2020 | British | 68 years |
| Philip John Addington | Director | 4 Jan 2010 | 8 Jun 2016 | British | 66 years |
| Robert Andrew Croucher | Director | 17 Aug 1991 | 10 Dec 1998 | British | 78 years |
| Robert James Cox | Director | 29 Sept 1998 | 31 Jul 2004 | British | 76 years |
| Robert James Cox | Secretary | 8 Nov 2001 | 2 Apr 2004 | British | - |
| Robert Philip Lorch | Director | 17 Aug 1991 | 30 Jan 1998 | British | 77 years |
| Roger James Bean | Secretary | 1 Sept 1998 | 8 Nov 2001 | British | - |
| Roger James Bean | Secretary | 1 Apr 2004 | 1 Feb 2007 | British | - |
| Roger John Mudd | Director | 8 Nov 2001 | 31 Jan 2013 | British | 77 years |
| Roland Ulric George | Secretary | 13 Jul 2015 | 6 Feb 2017 | - | - |
| Sunil Kumar Lakhenpaul | Director | 22 Jul 2004 | 14 Apr 2020 | British | 65 years |
| Tobias Ulf Helmut Schumacher | Secretary | 1 Feb 2007 | 31 Mar 2014 | British | - |