| Alan Paul Busson | Secretary | 15 Mar 2006 | 29 Sept 2006 | British | - |
| Amanda Louise Knott | Secretary | 29 Sept 2006 | 22 May 2013 | British | - |
| Ann Claire Blundell | Secretary | 22 May 2013 | 10 Feb 2014 | - | - |
| Anthony John Russell | Director | 1 May 1992 | 30 Apr 1998 | British | 84 years |
| Brian Williams | Director | 1 May 1992 | 30 Jun 1992 | British | 89 years |
| Christopher Walter Laidlaw | Director | 30 Oct 1997 | 13 Aug 1999 | British | 74 years |
| Clive Frederick Coates | Director | 1 May 1992 | 30 Oct 1997 | British | 82 years |
| Corina Katherine Ross | Secretary | 10 Feb 2011 | 22 May 2013 | British | - |
| David Arthur Lancaster | Director | 1 May 1992 | 20 Mar 1995 | British | 86 years |
| Helen Frances Leigh Rogers | Secretary | 14 Jul 2008 | 2 Dec 2011 | British | - |
| Ian Douglas Macrae | Director | 30 Apr 1998 | 16 May 2002 | British | 73 years |
| Ian Nicholas Lovett | Director | 10 Mar 2000 | 31 Dec 2006 | British | 82 years |
| Ian Ritchie | Secretary | 22 May 2013 | 10 Feb 2014 | - | - |
| James Anthony Wiltshire | Director | 20 Mar 1995 | 31 May 1999 | British | 83 years |
| James Anthony Wiltshire | Secretary | 1 May 1992 | 31 May 1999 | British | - |
| James Douglas Sutherland | Director | 28 Jun 2013 | 20 Oct 2017 | British | 52 years |
| Jayne Michelle Meacham | Secretary | 1 Nov 2006 | 2 May 2008 | British | - |
| Jonathan Vaughan-williams | Director | 25 Mar 2014 | 28 Apr 2017 | British | 59 years |
| Lily Olisa Holding | Director | 28 Jul 2004 | 23 Jun 2005 | British | 63 years |
| Lily Olisa Holding | Secretary | 12 Aug 2003 | 23 Jun 2005 | British | - |
| Margaret Elizabeth Gibbon | Secretary | 31 May 1999 | 12 Aug 2003 | British | - |
| Neil James Evans | Director | 15 May 2002 | 25 Mar 2014 | British | 69 years |
| Nigel Lowe | Director | 31 May 2007 | 28 Jun 2013 | British | 74 years |
| Nigel Lowe | Secretary | 23 Jun 2005 | 15 Mar 2006 | British | - |
| Peter Charles Howe | Director | 22 Jul 2003 | 28 Jul 2004 | British | 80 years |
| Vincent John Jerrard | Director | 31 May 1999 | 22 Jul 2003 | British | 71 years |
| William John Flynn | Director | 31 Dec 2006 | 31 May 2007 | British | 58 years |