| Adrian Timothy Rigby | Director | 9 Jun 2011 | 5 Mar 2012 | British | 60 years |
| Alan David Mcmeekin | Director | 21 Mar 1992 | 28 Feb 1995 | British | 79 years |
| Alan Mcalpine Keir | Director | 8 Dec 1998 | 17 Oct 2005 | British | 68 years |
| Alexa Jane Coates | Director | 19 Feb 2015 | 3 Aug 2017 | British | 56 years |
| Alice Read | Secretary | 17 Oct 2005 | 8 May 2006 | British | - |
| Brian Robertson | Director | 30 Jan 1997 | 31 Jan 2000 | British | 72 years |
| Colin Spencer Smith | Director | 4 Feb 1993 | 30 Dec 2003 | British | 80 years |
| Danielle Pass | Secretary | 5 Feb 2018 | 14 Jan 2020 | - | - |
| David Alan Thornham | Director | 21 Mar 1992 | 30 Sept 1994 | British | 89 years |
| David Edwin Gill | Director | 1 Mar 1996 | 4 Aug 2000 | British | 67 years |
| David Hellen | Director | 9 Jun 1997 | 8 Nov 2000 | British | 72 years |
| David William Baker | Director | 1 Feb 1996 | 12 Nov 1999 | British | 84 years |
| Dyfrig Dafydd Joseff John | Director | 1 Feb 1996 | 30 Dec 1996 | British | 30 years |
| Emma Suzanne Ferley | Secretary | 24 Sept 2010 | 2 Mar 2012 | British | - |
| Frances Julie Niven | Secretary | 23 Jul 2004 | 17 Oct 2005 | British | - |
| Gary Burton | Director | 17 Apr 2015 | 15 Dec 2017 | British | 64 years |
| Gavin Paul Hewitt | Director | 11 Aug 2011 | 23 Jan 2015 | British | 47 years |
| Geoffrey Peter Stewart Calvert | Director | 8 Nov 2000 | 13 Aug 2003 | British | 74 years |
| Geoffrey Vincent Poulter | Director | 1 Feb 1996 | 31 Jul 1997 | British | 80 years |
| Graham Edward Picken | Director | 12 Nov 1999 | 14 Jul 2003 | British | 77 years |
| Graham John Long | Director | 17 Apr 2002 | 17 Oct 2005 | British | 76 years |
| Helen Docherty | Secretary | 2 Mar 2012 | 23 Sept 2013 | - | - |
| Irene Mitchell Dorner | Director | 22 Sept 2003 | 13 Jul 2007 | British | 72 years |
| James Keith Barton | Secretary | 16 Jul 1993 | 8 Aug 1995 | British | - |
| John Christopher Wathan | Director | 8 Feb 1993 | 22 Mar 1994 | British | 81 years |
| John Cooper Jenkins | Director | 21 Mar 1992 | 8 Feb 1993 | British | 82 years |
| John Dickens Holloway | Director | 21 Mar 1992 | 8 Feb 1993 | British | 82 years |
| John Paul Casey | Director | 7 Mar 2008 | 24 Sept 2008 | British | 60 years |
| John Robert Brandon | Director | 11 Sept 2000 | 13 Aug 2003 | British | 82 years |
| John Robert Rendall | Director | 17 Oct 2005 | 13 Jul 2007 | British | 62 years |
| Katherine Dean | Secretary | 28 Apr 2014 | 29 Feb 2016 | - | - |
| Kenneth William Rigby | Director | 22 Mar 1994 | 30 Dec 1996 | British | 86 years |
| Leslie William Goble | Director | 11 Sept 2000 | 13 Aug 2003 | British | 65 years |
| Malcolm James Brookes | Director | 24 Sept 2008 | 9 Jun 2011 | British | 71 years |
| Mark Vivian Pearce | Secretary | 19 Dec 2002 | 23 Jul 2004 | British | - |
| Mary Josephine Margaret Mcnalty | Secretary | 23 Sept 2013 | 28 Apr 2014 | - | - |
| Michael John Russell-brown | Director | 4 Oct 2013 | 2 Jun 2015 | British | 78 years |
| Nigel Barker | Secretary | 21 Mar 1992 | 16 Jul 1993 | British | - |
| Nigel Barker | Secretary | 8 Aug 1995 | 3 Oct 1995 | British | - |
| Noel Paul Quinn | Director | 24 Feb 2009 | 31 Mar 2011 | British | 64 years |
| Noel Paul Quinn | Director | 11 Sept 2000 | 2 Feb 2004 | British | 64 years |
| Patrick George Wilkins | Director | 1 Mar 1996 | 30 Dec 1996 | British | 80 years |
| Patrick George Wilkins | Director | 22 Jan 1997 | 31 Oct 2002 | British | 80 years |
| Pauline Louise Mcquillan | Secretary | 8 May 2006 | 8 Oct 2008 | British | - |
| Peter Mccormack | Secretary | 13 Mar 2017 | 9 Nov 2017 | - | - |
| Richard Andrew Carter | Director | 27 Feb 2012 | 23 Dec 2015 | British | 65 years |
| Richard Davies | Director | 11 Dec 2015 | 10 Jul 2017 | British | 47 years |
| Richard Gavin Spence | Director | 1 Feb 2002 | 13 Jul 2007 | British | 67 years |
| Robert Francis Carver | Director | 27 Feb 2012 | 13 Oct 2014 | British | 67 years |
| Robert Hugh Musgrove | Secretary | 6 Aug 1999 | 19 Dec 2002 | Other | - |
| Robert Hugh Musgrove | Secretary | 13 Jul 2007 | 20 May 2011 | British | - |
| Robert Huw Morgan | Director | 13 Jul 2007 | 1 Feb 2012 | British | 66 years |
| Robert Laurence Wyatt | Director | 30 Sept 1994 | 31 Mar 1997 | British | 83 years |
| Robert Michael Henry | Director | 8 Feb 1993 | 1 Feb 1996 | British | 72 years |
| Robert Michael Walker | Director | 30 Dec 2003 | 4 Nov 2005 | British | 73 years |
| Rodney Jympson Duke | Director | 21 Jun 1999 | 1 Feb 2002 | British | 76 years |
| Sarah Caroline Gott | Secretary | 8 Oct 2008 | 24 Sept 2010 | British | - |
| Shaun Kevin Bryant | Secretary | 3 Oct 1995 | 6 Aug 1999 | British | - |
| Simon Wainwright | Director | 13 Jul 2007 | 15 Feb 2008 | British | 63 years |
| Stephen Andrew Bottomley | Director | 13 Jul 2007 | 24 Sept 2008 | British | 67 years |
| Stephen Andrew Bottomley | Director | 13 Jul 2007 | 25 Feb 2009 | British | 67 years |
| Stephen John Patrick Long | Director | 8 Nov 2000 | 13 Aug 2003 | British | 70 years |
| Stephen John Patrick Long | Director | 31 Oct 2003 | 13 Jul 2007 | British | 70 years |
| Thomas Robson | Director | 1 Feb 1996 | 10 Jun 1999 | British | 82 years |
| William Elfed Roberts | Director | 22 Jan 1997 | 31 Oct 2002 | British | 80 years |