| Alex Harrison | Director | 22 May 2007 | 15 Jul 2009 | British | 60 years |
| Andrew Howard Jacobs | Director | 14 Apr 1998 | 21 Aug 2000 | British | 74 years |
| Andrew Mark Parsons | Director | 2 Apr 2015 | 16 Jun 2015 | British | 61 years |
| Charles Stephen Cockroft | Secretary | 1 Nov 1992 | 30 Sept 1994 | British | - |
| Christina Ann Hankin | Secretary | 14 Sept 2018 | 31 Dec 2019 | - | - |
| Christopher George Haines | Director | 26 Nov 2001 | 27 Jun 2003 | British | 68 years |
| Colin Kemp | Director | 7 May 1997 | 16 May 2001 | British | 70 years |
| David Antony John Stoddard | Director | 1 Jul 2010 | 31 Mar 2012 | British | 53 years |
| David Clarke | Secretary | 11 Jun 2018 | 14 Sept 2018 | - | - |
| David Fisher | Director | 14 Apr 1998 | 25 Jun 1999 | British | 68 years |
| David Stephen Vallery | Director | 12 Jun 2003 | 16 May 2005 | British | 58 years |
| Donald James Mcpherson | Secretary | 1 Oct 1994 | 31 Aug 1995 | British | - |
| Donald James Mcpherson | Secretary | 23 Oct 2000 | 4 Sept 2001 | British | - |
| Graeme John Donaldson | Secretary | 11 Aug 2016 | 11 Jun 2018 | - | - |
| Graham Alistair Horn | Director | 12 Jun 2003 | 21 May 2007 | British | 67 years |
| Ian Henry Price | Director | 5 Dec 2018 | 10 Jul 2019 | British | 61 years |
| Ian Spencer Black | Director | 22 Nov 1996 | 14 Feb 2002 | British | 68 years |
| James Masson Black | Director | 20 Mar 2014 | 21 Sept 2016 | British | 62 years |
| Jane Pridgeon | Director | 25 Jun 1999 | 6 Nov 2000 | British | 73 years |
| Joanne Dawson | Director | 27 Jun 2003 | 16 Feb 2004 | British | 64 years |
| John Michael Butler | Secretary | 1 Mar 2003 | 16 Oct 2009 | British | - |
| John Warburton | Director | 3 Nov 1992 | 29 Aug 1995 | British | 67 years |
| John Warburton | Director | 15 Jul 2009 | 24 Jun 2010 | British | 67 years |
| Karen Joanne Mckay | Secretary | 16 Oct 2009 | 11 Aug 2016 | - | - |
| Keith William Abercromby | Director | 21 Aug 2000 | 12 Jun 2003 | British | 62 years |
| Kerr Luscombe | Director | 24 Jun 2010 | 25 May 2011 | British | 61 years |
| Lee Rhodri David Roberts | Director | 10 Jul 2019 | 21 Sept 2020 | British | 50 years |
| Marie Elaine Williams | Director | 11 Jun 2018 | 5 Dec 2018 | British | 47 years |
| Mario Emanuele Mazzocchi | Director | 9 Dec 2015 | 11 Jun 2018 | Italian | 53 years |
| Michael Fearnsides | Director | 1 Nov 1992 | 3 Nov 1992 | British | 90 years |
| Michael Robert Cherry | Director | 29 Aug 1995 | 18 Nov 1996 | British | 76 years |
| Neil Lindsay Nicholson Machray | Director | 10 Feb 2012 | 31 Mar 2013 | British | 57 years |
| Nicholas Goodwin Frankland | Director | 17 Jul 2009 | 24 Jun 2010 | British | 55 years |
| Paul Michael Martin | Director | 29 Aug 1995 | 14 Apr 1998 | British | 71 years |
| Peter John Roney | Director | 1 Nov 1992 | 28 Nov 1994 | British | 77 years |
| Philip Robert Grant | Director | 21 Sept 2016 | 11 Jun 2018 | British | 60 years |
| Raymond John Hildreth Milne | Director | 26 Nov 2001 | 15 Jul 2009 | British | 67 years |
| Richard Andrew Jones | Director | 18 Jun 2012 | 7 Dec 2015 | British | 54 years |
| Richard George Bell | Director | 1 Nov 1992 | 29 Aug 1995 | British | 86 years |
| Richard George Myers | Director | 30 Nov 2001 | 12 Jun 2003 | British | 69 years |
| Robert Keith Moorhouse | Secretary | 16 Nov 2001 | 1 Mar 2003 | British | - |
| Robert William Fletcher | Director | 6 Oct 2011 | 16 Apr 2014 | British | 62 years |
| Ronald Frank Cameron Taylor | Director | 16 Apr 2014 | 31 Dec 2017 | British | 60 years |
| Sally Mayer | Secretary | 4 Sept 2001 | 16 Nov 2001 | British | - |
| Simon David Massey | Director | 11 Jul 2013 | 20 Mar 2014 | British | 62 years |
| Simon Hugh Burton | Director | 28 Nov 2001 | 30 Jun 2002 | British | 72 years |
| Simon Nicholas Waite | Secretary | 31 Aug 1995 | 23 Oct 2000 | British | - |
| Stephen John Mann | Director | 29 Aug 1995 | 31 Dec 1996 | British | 77 years |
| Stephen Young | Director | 16 May 2001 | 19 Dec 2001 | British | 66 years |
| Susan Anne Concannon | Director | 19 Apr 2002 | 31 Aug 2010 | British | 71 years |
| William Anthony Beadle | Director | 1 Nov 1992 | 29 Aug 1995 | British | 77 years |