| Alan Richard Emery | Director | 21 Jun 1991 | 28 Nov 2003 | British | 82 years |
| Alexander Reginald Benton | Director | 23 May 1996 | 28 Oct 2005 | British | 74 years |
| Alexander Reginald Benton | Director | 29 Nov 2010 | 15 May 2013 | British | 74 years |
| Anthony Charles Taylor | Secretary | 21 Mar 1997 | 1 Jun 1998 | British | - |
| Charles Peter Cobb | Director | 21 Jun 1991 | 28 Oct 2005 | British | 71 years |
| Charles Peter Cobb | Director | 29 Nov 2010 | 15 May 2013 | British | 71 years |
| Christopher Eric Walker | Director | 21 Jun 1991 | 17 Dec 2004 | British | 74 years |
| Clive David Bastin | Director | 21 Jun 1991 | 11 Jun 1992 | British | 88 years |
| David James Lanchester | Secretary | 23 Nov 1995 | 21 Mar 1997 | British | - |
| David Keith Tipping | Secretary | 23 Jun 1993 | 12 Nov 1995 | British | - |
| David Keith Tipping | Secretary | 1 Jun 1998 | 10 Apr 2012 | British | - |
| Dennis John Cope | Director | 21 Jun 1991 | 28 Oct 2005 | British | 92 years |
| Elizabeth Barbara Cheney | Secretary | 24 Apr 2017 | 31 Dec 2017 | - | - |
| Ian Timothy Closier | Director | 1 Aug 1993 | 2 Nov 2005 | British | 71 years |
| James Anderson | Director | 21 Jun 1991 | 31 Dec 2002 | British | 81 years |
| James Thomas Holliday | Director | 1 Nov 2011 | 31 Dec 2017 | British | 70 years |
| Jeremy Philip Hilton Vickers | Secretary | 19 Jun 2014 | 24 Jul 2015 | - | - |
| Jeremy Philip Hilton Vickers | Director | 23 May 2014 | 24 Jul 2015 | British | 68 years |
| Jeremy Simon Gee | Director | 15 Mar 2017 | 17 Sept 2018 | British | 58 years |
| John Bryan Cousins | Director | 21 Jun 1991 | 28 Oct 2005 | British | 93 years |
| John Bryan Cousins | Director | 9 May 2007 | 31 Dec 2010 | British | 93 years |
| John Finlay Alexander Kirkpatrick | Director | 16 May 2002 | 31 Oct 2005 | British | 83 years |
| John Haggerstone | Director | 14 Jul 2004 | 31 Oct 2005 | British | 67 years |
| John Norman Daniel Bickel | Director | 21 Jun 1991 | 3 Sept 1998 | British | 87 years |
| Martin John Sidders | Director | 7 Apr 2009 | 19 Jun 2014 | British | 67 years |
| Martin John Sidders | Secretary | 11 Apr 2012 | 19 Jun 2014 | - | - |
| Michael Blakey | Director | 29 Nov 2010 | 30 Jun 2020 | British | 62 years |
| Michael Raymond Walker | Director | 15 Mar 2016 | 30 Apr 2021 | British | 67 years |
| Nicholas Martin Dulcken | Director | 9 May 2007 | 31 Dec 2019 | British | 58 years |
| Nicolas Martin Dulcken | Director | 23 Apr 2001 | 28 Oct 2005 | British | 58 years |
| Patricia Gillis | Director | 22 Mar 2002 | 27 Mar 2002 | British | 71 years |
| Peter Reginald Miell | Director | 21 Jun 1991 | 30 Jun 1995 | British | 95 years |
| Richard Henry Westcott | Director | 22 Jul 1992 | 31 Jan 2004 | British | 78 years |
| Richard Henry Westcott | Secretary | 11 Jan 1993 | 23 Jun 1993 | British | - |
| Richard James Paterson | Director | 4 Jan 2005 | 31 Oct 2005 | British | 68 years |
| Richard James Paterson | Director | 31 May 2007 | 31 Mar 2020 | British | 68 years |
| Roderick Roy Macgillivray | Director | 15 May 2000 | 20 May 2004 | British | 75 years |
| Simon Anthony Hill | Director | 20 Apr 1994 | 29 Feb 1996 | British | 85 years |
| Stephen Charles Casey | Director | 21 Jun 1991 | 31 Mar 2010 | British | 76 years |
| Steven Edward Porter | Director | 21 Jun 1991 | 11 Jan 1993 | British | 76 years |
| Steven Edward Porter | Secretary | 21 Jun 1991 | 11 Jan 1993 | British | - |
| Susan Gaynor Hide | Secretary | 24 Jul 2015 | 24 Apr 2017 | - | - |
| William Norris Bolt | Director | 21 Jun 1991 | 19 Sept 1996 | British | 94 years |