| Alan Paul Busson | Secretary | 5 Apr 2006 | 29 Sept 2006 | British | - |
| Amanda Louise Knott | Secretary | 29 Sept 2006 | 22 May 2013 | British | - |
| Andrew Stephen Melcher | Director | 1 May 1992 | 15 Oct 1997 | U S | 77 years |
| Ann Claire Blundell | Secretary | 22 May 2013 | 10 Feb 2014 | - | - |
| Bryan James Howett | Director | 1 Feb 1999 | 31 May 1999 | Irish | 70 years |
| Clive Frederick Coates | Director | 1 May 1992 | 30 Oct 1997 | British | 82 years |
| Corina Katherine Ross | Secretary | 4 Feb 2011 | 22 May 2013 | British | - |
| Derek Richard Woodward | Director | 31 May 1999 | 31 Aug 2001 | British | 68 years |
| Derek Richard Woodward | Secretary | 31 May 1999 | 31 Aug 2001 | British | - |
| Grenville Reid | Director | 31 May 1999 | 20 Jul 2004 | British | 79 years |
| Helen Frances Leigh Rogers | Secretary | 14 Jul 2008 | 2 Dec 2011 | British | - |
| Ian Ritchie | Secretary | 22 May 2013 | 10 Feb 2014 | - | - |
| James Anthony Wiltshire | Director | 1 May 1992 | 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 | - |
| John Stuart Nicholas | Director | 1 Feb 1999 | 31 May 1999 | British | 77 years |
| Jonathan Vaughan-williams | Director | 25 Mar 2014 | 28 Apr 2017 | British | 59 years |
| Lily Olisa Holding | Director | 20 Jul 2004 | 4 May 2005 | British | 63 years |
| Lily Olisa Holding | Secretary | 20 Jul 2004 | 4 May 2005 | British | - |
| Michael John Chandler | Director | 1 Feb 1999 | 31 May 1999 | British | 69 years |
| Neil James Evans | Director | 31 May 2007 | 25 Mar 2014 | British | 69 years |
| Nigel Lowe | Director | 4 May 2005 | 28 Jun 2013 | British | 74 years |
| Nigel Lowe | Secretary | 4 May 2005 | 5 Apr 2006 | British | - |
| Paul Barrington Knowles Hitchings | Director | 30 Oct 1997 | 1 Feb 1999 | British | 83 years |
| Penelope Ruth Sutton | Director | 31 May 1999 | 2 Feb 2001 | British | 62 years |
| Peter Charles Howe | Director | 22 Jul 2003 | 20 Jul 2004 | British | 80 years |
| Peter Charles Howe | Secretary | 4 Sept 2001 | 20 Jul 2004 | British | - |
| Robert William Torrance | Director | 30 Oct 1997 | 1 Feb 1999 | Australian | 68 years |
| Victoria Louise De Temple | Director | 13 Nov 2017 | 1 May 2018 | British | 48 years |
| Vincent John Jerrard | Director | 4 Sept 2001 | 22 Jul 2003 | British | 71 years |
| William John Flynn | Director | 20 Jul 2004 | 31 May 2007 | British | 58 years |