| Andrew Tweedie | Secretary | 31 Oct 2010 | 30 Jun 2011 | British | - |
| Arthur Dodgson | Director | 14 Feb 2003 | 21 Oct 2008 | British | 73 years |
| Carolyn Sephton | Secretary | 1 Jul 2006 | 31 Oct 2010 | British | - |
| Catherine Mary Bland | Director | 3 Oct 2011 | 29 Nov 2013 | British | 57 years |
| Charles John Allwood | Director | 17 Sept 1999 | 17 Aug 2001 | British | 75 years |
| Christopher Moyes | Director | 17 Aug 2001 | 8 Jul 2006 | British | 77 years |
| Colin Richard White | Director | 24 May 1996 | 21 Dec 2001 | British | 63 years |
| Craig Ashall | Secretary | 1 Jul 2011 | 12 Mar 2012 | British | - |
| David Alistair Turnbull | Secretary | 12 Mar 2012 | 30 May 2014 | - | - |
| David Dennis Mcintosh | Director | 3 Oct 2011 | 30 Jun 2014 | British | 63 years |
| David Emerson Morton | Director | 31 Oct 2010 | 3 Oct 2011 | British | 74 years |
| David John Cole | Director | 22 Sept 1994 | 21 May 1996 | British | 68 years |
| Dennis Jared | Director | 6 Jun 1994 | 12 Apr 1996 | British | 72 years |
| Dennis Leslie Clark | Director | 30 Sept 1998 | 17 Aug 2001 | British | 83 years |
| Forsyth Rutherford Black | Director | 2 Jun 2014 | 5 Aug 2016 | British | 57 years |
| Gavin Hugh Gracie | Director | 9 Dec 1996 | 30 Sept 1998 | British | 70 years |
| Giles Robert Bryant Wilson | Director | 20 May 2016 | 4 Sept 2018 | British | 53 years |
| Gordon Howat Williams | Director | 6 Jun 1994 | 9 Dec 1996 | British | 95 years |
| Ian Philip Butcher | Director | 17 Aug 2001 | 1 Jul 2007 | British | 75 years |
| Ian Philip Butcher | Secretary | 17 Aug 2001 | 30 Jun 2006 | British | - |
| Jane Allison Dyson | Director | 31 Oct 2010 | 3 Oct 2011 | British | 63 years |
| John Andrew Bolton | Director | 29 Sept 1991 | 9 Jan 2002 | British | 74 years |
| John Dacre Capstick | Director | 29 Sept 1991 | 22 Sept 1994 | British | 113 years |
| John Francis Alexander Geddes | Secretary | 30 May 2014 | 4 Sept 2018 | - | - |
| Keith Lawrence Ludeman | Director | 10 Jul 2006 | 31 Oct 2010 | British | 76 years |
| Lawrence Kingsley Guest | Director | 29 Sept 1991 | 20 Aug 1992 | British | 90 years |
| Mark Stephen Cassie | Director | 5 Aug 2016 | 4 Sept 2018 | British | 62 years |
| Martin Stanley Andrew Ballinger | Director | 17 Aug 2001 | 31 Dec 2004 | British | 83 years |
| Michael Percy Timson | Director | 29 Sept 1991 | 2 Apr 1998 | British | 75 years |
| Nicholas Swift | Director | 17 Jul 2007 | 31 Oct 2010 | British | 62 years |
| Paul Andrew Vickers | Director | 6 Jun 1994 | 17 Aug 2001 | British | 66 years |
| Peter James O'boyle | Director | 17 Aug 2001 | 16 Jan 2003 | British | 77 years |
| Philip John Stewart | Director | 6 Jun 1994 | 9 Dec 1996 | British | 92 years |
| Richard John Hunt | Director | 14 Feb 2003 | 8 Feb 2006 | British | 75 years |
| Simon Mark Prodger | Director | 3 Oct 2011 | 28 Feb 2013 | British | 67 years |
| Terence Michael Connor | Director | 15 Apr 1993 | 30 Sept 1999 | British | 71 years |
| Thomas Keane | Secretary | 29 Sept 1991 | 17 Aug 2001 | British | - |
| Walter Leo Cowley | Director | 24 May 1996 | 17 Aug 2001 | British | 73 years |