| Adam Mark Goulcher | Director | 18 Sept 1999 | 14 Jul 2003 | British | 65 years |
| Alan Keith Watkins | Director | 1 Oct 1992 | 30 Jun 1994 | British | 88 years |
| Andrew Arthur William Harper | Director | 18 Sept 1999 | 1 Jan 2001 | British | 72 years |
| Andrew Martin Pollins | Director | 27 Apr 2010 | 31 Dec 2019 | British | 59 years |
| Andrew Peter Stanton Lord | Director | 29 Jun 2020 | 15 Dec 2022 | British | 56 years |
| Ann Constance Burfutt | Director | 3 Jan 1995 | 31 Jul 2001 | British | 73 years |
| Anthony Edward Maguire | Director | 15 Mar 2000 | 30 May 2003 | British | 72 years |
| Anthony John Sheppeck | Director | 30 Aug 1991 | 28 Aug 1998 | British | 86 years |
| Barry Richard Hutton | Director | 15 Jul 2003 | 1 Mar 2004 | British | 72 years |
| Brian Appleton | Director | 23 Sept 1996 | 14 Jul 2003 | British | 95 years |
| Brian Mellitt | Director | 30 Aug 1991 | 31 Mar 1995 | British | 86 years |
| Charles Stuart Horton | Director | 18 Sept 1999 | 24 Jul 2000 | British | 62 years |
| Charles Wilfrid Newton | Director | 30 Aug 1991 | 31 Mar 1993 | British | 98 years |
| Charles Wilfrid Newton | Director | 11 Mar 1994 | 15 Sept 1994 | British | 98 years |
| Christopher Deacon | Director | 10 Feb 2000 | 31 May 2001 | British | 79 years |
| Christopher Jeffrey Jonathan Smith | Director | 18 Sept 1999 | 14 Jul 2003 | British | 65 years |
| David Bailey | Director | 3 Jan 1995 | 11 Aug 1999 | British | 87 years |
| David Crawley | Director | 18 Sept 1999 | 1 Jan 2001 | British | 70 years |
| David Emrys Hughes | Director | 23 Oct 2017 | 6 Dec 2019 | British | 56 years |
| David Gogo Waboso | Director | 19 May 2005 | 23 May 2016 | British | 70 years |
| David John Hornby | Director | 11 May 1995 | 11 Sept 1998 | British | 80 years |
| Denis Tunnicliffe | Director | 30 Aug 1991 | 30 Jun 2000 | British | 83 years |
| Derek Vincent Smith | Director | 1 Feb 1999 | 19 Dec 2001 | British | 78 years |
| Donald William Turner | Director | 30 Aug 1991 | 31 Mar 1993 | British | 101 years |
| Edmund Arthur Wallis | Director | 19 Dec 2001 | 14 Jul 2003 | British | 87 years |
| Ellen Howard | Secretary | 2 Oct 2008 | 15 Jul 2011 | Other | - |
| Fiona Brown Smith | Secretary | 1 Apr 2005 | 23 Dec 2005 | British | - |
| Frances Low | Secretary | 31 May 1997 | 14 Jul 2003 | British | - |
| Gareth William Powell | Director | 13 Oct 2011 | 1 Sept 2016 | British | 50 years |
| Geoffrey Donald Virrels | Director | 27 Nov 2008 | 2 Oct 2009 | British | 80 years |
| Glynn Edward Barton | Director | 19 Dec 2022 | 17 May 2024 | British | 48 years |
| Howard Ernest Carter | Secretary | 4 Sept 2006 | 29 Sept 2023 | British | - |
| Howard Paul Collins | Director | 27 Apr 2010 | 21 Jun 2013 | British | 67 years |
| Hugh Lovell Sumner | Director | 3 Jan 1995 | 1 Jan 2001 | United Kingdom | 69 years |
| Ian Eric King | Secretary | 16 Feb 1995 | 30 May 1997 | British | - |
| Jacqueline Anne Gregory | Secretary | 15 Jul 2003 | 4 Jun 2004 | British | - |
| Jeffrey Henderson Pipe | Secretary | 4 Sept 2006 | 9 Jul 2010 | British | - |
| Jenkin Keith Davies | Director | 1 Apr 1993 | 22 Sept 1996 | British | 95 years |
| Jill Louise Collis | Director | 3 Jun 2013 | 6 Sept 2019 | British | 58 years |
| Joanne Marie Chance | Secretary | 14 Jun 2004 | 30 Sept 2007 | British | - |
| John James Hughes | Director | 30 Aug 1991 | 3 Aug 2000 | British | 80 years |
| John James Hughes | Director | 31 Dec 2001 | 14 Jul 2003 | British | 80 years |
| John James Hughes | Secretary | 30 Aug 1991 | 16 Feb 1995 | British | - |
| Keith Beattie | Director | 18 Sept 1999 | 9 Aug 2005 | British | 80 years |
| Louella Maria Johnson | Director | 15 Jul 2003 | 26 Sept 2007 | British | 72 years |
| Louisa Dianne Sherry | Secretary | 14 Jun 2004 | 1 Apr 2005 | British | - |
| Mark Wild | Director | 1 Sept 2016 | 2 Nov 2018 | British | 61 years |
| Martin John Callaghan | Director | 6 May 1999 | 14 Jul 2003 | British | 70 years |
| Maurice Vogel | Director | 30 Aug 1991 | 31 Mar 1993 | British | 104 years |
| Michael John Strzelecki | Director | 18 Sept 1999 | 30 Sept 2016 | British | 76 years |
| Michael William Tuke Brown | Director | 8 Jan 2001 | 31 Jul 2008 | British | 62 years |
| Michael William Tuke Brown | Director | 22 Mar 2010 | 1 Sept 2016 | British | 62 years |
| Naomi Anne Connell | Director | 1 Mar 2004 | 31 Dec 2009 | British | 61 years |
| Nigel Graham Holness | Director | 5 Nov 2018 | 31 Jul 2019 | British | 60 years |
| Norman Victor Cohen | Director | 4 May 1995 | 31 Dec 1997 | British | 86 years |
| Paul Geoffrey Arthur Godier | Director | 18 Sept 1999 | 14 Jul 2003 | British | 77 years |
| Peter John Ford | Director | 30 Aug 1994 | 22 Apr 1998 | British | 88 years |
| Peter William Mcguirk | Secretary | 24 Dec 2005 | 2 Oct 2006 | British | - |
| Peter Zuk | Director | 14 Sept 2004 | 24 Jan 2008 | Us American | 73 years |
| Philip Hufton | Director | 27 Apr 2010 | 2 Jan 2015 | British | 69 years |
| Richard James Lewis Parry | Director | 27 Nov 2008 | 30 Sept 2011 | British | 60 years |
| Robert Frank Dorey | Director | 30 Aug 1991 | 25 Nov 1996 | British | 87 years |
| Robert Frank James Mason | Director | 8 Oct 2001 | 14 Jul 2003 | British | 73 years |
| Robert Henry Janowski | Director | 15 Jul 2003 | 12 Feb 2004 | Us | 81 years |
| Robert Ian Mcmillan Arthurton | Director | 1 Nov 1991 | 10 Dec 1994 | British | 88 years |
| Robin Campbell Jeffrey | Director | 1 Oct 1996 | 23 Jul 1998 | British | 87 years |
| Sarah Anne Atkins | Director | 27 Nov 2008 | 30 Sept 2016 | British | 71 years |
| Simon Patrick Butcher | Director | 18 Oct 1999 | 31 Dec 2001 | British | 59 years |
| Stephen Mark Griffiths | Director | 15 Jun 2015 | 30 Mar 2017 | British | 60 years |
| Tanya Louise Coff | Director | 23 Oct 2017 | 20 Nov 2020 | British | 64 years |
| Timothy Terrence O'toole | Director | 15 Jul 2003 | 30 Apr 2009 | American | 71 years |