| Alan Naismith Binder | Director | 19 Dec 1995 | 16 May 2000 | British | 95 years |
| Amos Henry Chilver | Director | 26 Jan 1993 | 1 Oct 1997 | British | 100 years |
| Andrew Michael David Kirkman | Director | 1 Jan 2016 | 30 Jun 2019 | British | 54 years |
| Andrew Rolland Cunningham | Director | 26 Apr 2016 | 31 Oct 2020 | British | 70 years |
| Anthony Donnelly | Director | 24 Mar 2015 | 30 Sept 2019 | British | 62 years |
| Brian Lynn Staples | Director | 1 Sept 1999 | 31 Dec 2003 | British | 81 years |
| Christopher Mary Masterson | Director | 27 Sept 1992 | 1 Oct 1992 | British | 70 years |
| Christopher Mary Masterson | Director | 16 Oct 1992 | 27 Sept 1993 | British | 70 years |
| Christopher Mawe | Director | 1 Mar 2004 | 17 Sept 2007 | British | 64 years |
| David Graham Brocksom | Director | 18 Sept 2007 | 31 Dec 2012 | British | 66 years |
| David Harold Jones | Director | 1 Jan 2003 | 15 Nov 2010 | British | 84 years |
| Gareth John Williams | Director | 15 Feb 2010 | 7 Dec 2012 | British | 60 years |
| Garold Ralph Spindler | Director | 23 Oct 2001 | 1 Sept 2007 | American | 79 years |
| Geoffrey Keith Howard Mason | Secretary | 18 Jun 2014 | 6 Jun 2016 | - | - |
| Geoffrey Keith Howard Mason | Secretary | 8 Aug 2012 | 12 Jul 2013 | British | - |
| George William Jarrett | Director | 27 Sept 1992 | 1 Sept 1999 | British | 92 years |
| Gordon Allister Mcphie | Director | 27 Sept 1992 | 1 Oct 2004 | British | 74 years |
| Graham Frederick Butler | Director | 27 Sept 1992 | 19 May 1993 | British | 92 years |
| Graham Reid Menzies | Director | 1 Jun 2004 | 9 Mar 2006 | British | 78 years |
| James Ian Keith Murray | Director | 22 Sept 2003 | 30 Apr 2006 | British | 80 years |
| Jeremy Rhodes | Secretary | 31 May 2012 | 8 Aug 2012 | British | - |
| Jeremy Richard Hague | Director | 1 Jan 2013 | 30 Apr 2015 | British | 62 years |
| John Harris Robinson | Director | 1 Oct 1997 | 29 Apr 2003 | British | 86 years |
| Jonathan Paul Moulton | Director | 27 Sept 1992 | 24 Jun 1994 | British | 76 years |
| Jonathan Simon Lloyd | Director | 3 Jul 2006 | 15 Nov 2010 | British | 70 years |
| Jonson Cox | Director | 15 Nov 2010 | 31 Mar 2018 | British | 70 years |
| Keith Louis Heller | Director | 19 Apr 2011 | 7 Dec 2012 | Canadian | 78 years |
| Kevin Ian Whiteman | Director | 1 Jun 2007 | 31 Mar 2011 | British | 70 years |
| Lisa Jane Clement | Director | 15 Dec 2011 | 31 Oct 2020 | British | 59 years |
| Melvin Garness | Director | 30 Dec 1994 | 28 Oct 2004 | British | 81 years |
| Melvin Garness | Secretary | 27 Sept 1992 | 29 Mar 2005 | British | - |
| Michael Richardson | Director | 24 Mar 2015 | 29 Feb 2016 | British | 63 years |
| Michael Rodney Toms | Director | 3 May 2006 | 30 Jun 2011 | British | 73 years |
| Patrick Sampson O'brien | Director | 27 Sept 1992 | 22 Feb 1993 | British | 84 years |
| Patrick Sampson O'brien | Director | 1 Dec 1995 | 28 Nov 2005 | British | 84 years |
| Peter Charles Fletcher Hickson | Director | 1 Jul 2011 | 26 Apr 2016 | British | 81 years |
| Peter Frank Hazell | Director | 22 Sept 2003 | 31 Dec 2011 | British | 78 years |
| Peter Wheeldon Parkin | Director | 3 Mar 1993 | 21 May 1996 | British | 80 years |
| Richard Andrew Cole | Secretary | 29 Mar 2005 | 31 May 2012 | British | - |
| Richard John Budge | Director | 27 Sept 1992 | 27 Feb 2001 | British | 79 years |
| Richard Owen Michaelson | Director | 2 Oct 2007 | 7 Dec 2012 | British | 60 years |
| Richard Owen Michaelson | Director | 24 Mar 2015 | 31 Oct 2020 | British | 60 years |
| Robert Neil Shrager | Director | 24 Jun 1994 | 27 Apr 2004 | British | 78 years |
| Roger Anthony Frederick Heath | Director | 1 Oct 1992 | 19 May 1993 | British | 83 years |
| Ross Buckland | Director | 1 May 1995 | 1 Oct 1999 | Australian | 84 years |
| Ruth Margaret Cooke | Director | 19 Mar 2019 | 19 May 2025 | British | 51 years |
| Steven Keith Underwood | Director | 2 Aug 2010 | 31 Dec 2024 | British | 52 years |
| Theresa Casey | Secretary | 3 Jul 2013 | 17 Jun 2014 | - | - |
| William Rowell | Director | 30 Dec 1994 | 31 Dec 1998 | British | 80 years |