| Alan Burge | Director | 16 Mar 2009 | 22 Dec 2010 | British | 69 years |
| Alan Simmons | Director | 28 May 1991 | 21 Apr 1998 | British | 87 years |
| Alan Simmons | Secretary | 8 Jul 1991 | 28 Aug 1992 | British | - |
| Andrew George Parker | Director | 22 Dec 2010 | 13 Oct 2011 | British | 57 years |
| Andrew James Timlin | Director | 29 Jun 2020 | 28 May 2021 | British | 49 years |
| Andrew Paul Bronstein | Director | 25 Feb 2005 | 14 Sept 2005 | American | 68 years |
| Anne Patricia Munson | Secretary | 18 Apr 1996 | 30 May 2003 | British | - |
| Bibi Rahima Ally | Secretary | 30 May 2003 | 25 Feb 2005 | British | - |
| Brian Roy Chapman | Director | 28 May 1993 | 13 Mar 2009 | British | 71 years |
| Brian Roy Chapman | Secretary | 28 May 1993 | 18 Apr 1996 | British | - |
| Bruce Brain | Director | 28 May 1991 | 28 Aug 1992 | British | 85 years |
| Bruce Brain | Director | 28 May 1993 | 30 Apr 2008 | British | 85 years |
| Christopher Charles Shirtcliffe | Director | 21 Apr 1998 | 31 May 2002 | British | 82 years |
| Christopher Francis Henry Baker | Director | 14 Nov 2016 | 28 May 2021 | British | 71 years |
| Craig Hilton Rodgerson | Director | 13 Oct 2011 | 14 Nov 2016 | British | 62 years |
| David Lawrence Williams | Director | 17 Oct 1997 | 25 Feb 2005 | British | 74 years |
| David Peter Charles Tidsall | Secretary | 28 Aug 1992 | 28 May 1993 | British | - |
| Edmund Alan Hough | Director | 18 Apr 1996 | 26 Aug 1997 | British | 82 years |
| Eric Ian Richard Sands | Director | 16 Nov 1992 | 17 Aug 1993 | British | 90 years |
| Gilbert Omar Santos | Director | 1 Jan 2007 | 22 Dec 2010 | American | 66 years |
| Gordon Ian Campbell | Director | 21 Apr 1998 | 31 May 2000 | British | 75 years |
| Howard Wallis | Secretary | 25 Feb 2005 | 22 Dec 2010 | British | - |
| James Cowan | Director | 26 Jan 2017 | 2 May 2023 | British | 52 years |
| Jamie Leigh Radford | Director | 3 Sept 2015 | 1 Sept 2016 | British | 51 years |
| Jason Christopher Brickell | Director | 1 Jun 2000 | 25 Feb 2005 | British | 57 years |
| John Bruce Tough | Director | 31 Jan 1995 | 31 Aug 2000 | British | 76 years |
| John Leonard Gibson | Director | 9 Jul 2008 | 22 Dec 2010 | British | 74 years |
| Karen Yates | Director | 16 Nov 1992 | 31 Dec 1993 | British | 64 years |
| Kerin Susanne Kimber | Secretary | 24 Nov 2008 | 22 Dec 2010 | New Zealander | - |
| Kevin Bryan Chevis | Director | 12 Sept 1994 | 25 Feb 2005 | British | 66 years |
| Kevin Thomas Lynch | Director | 1 Jul 1998 | 31 Jul 2000 | British | 62 years |
| Lawrence Alan Gross | Director | 25 Feb 2005 | 31 Dec 2005 | American | 74 years |
| Michael Geoffrey Wilkinson | Director | 18 Apr 1996 | 30 Apr 2000 | British | 76 years |
| Michael John Bateson | Director | 5 Aug 1996 | 31 Jul 2000 | British | 79 years |
| Michael Joseph Ruane | Director | 26 Sept 2005 | 30 Nov 2009 | United States | 73 years |
| Michael Patrick Collier | Director | 20 Dec 2013 | 3 Sept 2015 | British | 51 years |
| Neil Hamilton Lethby | Director | 28 May 1991 | 24 Jul 1991 | British | 74 years |
| Neil Hamilton Lethby | Secretary | 28 May 1991 | 8 Jul 1991 | British | - |
| Peter Martin Stansfield | Director | 21 Apr 1998 | 31 Dec 2002 | British | 76 years |
| Peter Thomas Humphrey | Director | 5 Aug 1996 | 31 Dec 1997 | British | 92 years |
| Philip Noel Whitlock | Director | 5 Aug 1996 | 2 Jun 2000 | British | 74 years |
| Philip Whitehead | Director | 28 May 1991 | 23 Aug 1991 | British | 85 years |
| Philip Whitehead | Director | 1 Jul 1994 | 18 Apr 1996 | British | 85 years |
| Richard David Mogg | Director | 13 Oct 2011 | 29 Jun 2012 | British | 50 years |
| Richard Hubert Gordon Gilbey | Director | 4 Dec 2009 | 22 Dec 2010 | British | 61 years |
| Richard John Shearer | Director | 22 Dec 2010 | 15 Oct 2013 | British | 62 years |
| Robert Franklin Clarke | Director | 25 Feb 2005 | 31 Dec 2006 | American | 82 years |
| Robin Chillman | Director | 1 Jul 1994 | 25 Feb 2005 | British | 72 years |
| Robin William Derrick Smith | Director | 30 Nov 2004 | 25 Feb 2005 | British | 71 years |
| Rodney Turvey | Director | 28 May 1991 | 31 Dec 1993 | British | 80 years |
| Scott Michael Frewing | Director | 7 Jun 2019 | 4 Apr 2024 | British | 51 years |
| Stefan John Maynard | Director | 20 Dec 2013 | 29 Jun 2020 | British | 54 years |
| Trevor Leslie Dighton | Director | 31 May 2002 | 30 May 2003 | British | 77 years |
| Victoria Elizabeth Silbey | Director | 1 Jan 2006 | 22 Dec 2010 | American | 63 years |
| William Stephen Mcbrinn | Director | 1 Sept 2016 | 28 Feb 2017 | British | 58 years |