| Amanda Louise Knott | Secretary | 23 Dec 2008 | 28 Jun 2013 | British | - |
| Andrew David Strang | Director | 10 Feb 1994 | 18 Sept 1995 | British | 73 years |
| Ann Claire Blundell | Secretary | 28 Jun 2013 | 17 Mar 2014 | - | - |
| Bernard John Monaghan | Director | 1 May 1992 | 30 Apr 1993 | British | 85 years |
| Brian Williams | Director | 1 May 1992 | 30 Jun 1992 | British | 89 years |
| Bryan James Howett | Director | 1 Feb 1999 | 11 Apr 2000 | Irish | 70 years |
| Clive Frederick Coates | Director | 1 May 1992 | 30 Oct 1997 | British | 82 years |
| Corina Katherine Ross | Secretary | 10 Mar 2011 | 28 Jun 2013 | British | - |
| Helen Frances Leigh Rogers | Secretary | 23 Dec 2008 | 2 Dec 2011 | British | - |
| Ian Humphries James | Director | 6 Oct 1994 | 30 Oct 1997 | British | 75 years |
| Ian Malcolm Macinnes | Director | 1 May 1992 | 1 May 1994 | British | 81 years |
| Ian Ritchie | Secretary | 28 Jun 2013 | 17 Mar 2014 | - | - |
| James Anthony Wiltshire | Director | 18 Sept 1995 | 31 May 1999 | British | 83 years |
| James Anthony Wiltshire | Secretary | 1 May 1992 | 31 May 1999 | British | - |
| Jeanette Ann Harris | Director | 28 Jun 2013 | 31 Dec 2018 | British | 62 years |
| Joanne Claire Atkinson | Director | 31 Mar 2003 | 2 Aug 2004 | British | 54 years |
| Joanne Claire Atkinson | Secretary | 31 Mar 2003 | 7 Aug 2005 | British | - |
| John Stuart Nicholas | Director | 1 Feb 1999 | 9 Oct 2003 | British | 77 years |
| Jonathan Vaughan-williams | Director | 1 Apr 2016 | 28 Apr 2017 | British | 59 years |
| Malcolm Denys Comfort | Director | 18 Sept 1995 | 25 Jun 1996 | British | 70 years |
| Margaret Ann Porter | Director | 25 Sept 2007 | 23 Dec 2008 | British | 71 years |
| Margaret Ann Porter | Secretary | 3 Oct 2006 | 23 Dec 2008 | British | - |
| Mark Christopher Chessher | Director | 12 Apr 2002 | 3 Oct 2006 | British | 66 years |
| Mark George Culmer | Director | 5 Jun 2000 | 12 Apr 2002 | British | 64 years |
| Michael John Chandler | Director | 1 Feb 1999 | 31 Mar 2003 | British | 69 years |
| Michael John Chandler | Secretary | 31 May 1999 | 31 Mar 2003 | British | - |
| Neil James Evans | Director | 23 Dec 2008 | 31 Mar 2016 | British | 69 years |
| Nigel Lowe | Director | 23 Dec 2008 | 30 Jun 2013 | British | 74 years |
| Paul Barrington Knowles Hitchings | Director | 30 Oct 1997 | 1 Feb 1999 | British | 83 years |
| Paul Frank Worthington | Director | 2 Aug 2004 | 28 Sept 2007 | British | 74 years |
| Paul Frank Worthington | Secretary | 2 Aug 2004 | 28 Sept 2007 | British | - |
| Penelope Jane James | Director | 3 Oct 2006 | 31 Mar 2007 | British | 57 years |
| Robert William Torrance | Director | 25 Jun 1996 | 1 Feb 1999 | Australian | 68 years |
| Timothy James Grant | Director | 28 Mar 2007 | 23 Dec 2008 | British | 62 years |
| Timothy James Grant | Director | 30 May 2017 | 22 Aug 2023 | British | 62 years |