| Alain Christopher Guy Stangroome | Director | 1 Jul 2010 | 30 Sept 2011 | British | 61 years |
| Alain Christopher Guy Stangroome | Director | 31 Oct 2011 | 19 May 2017 | British | 61 years |
| Alan Roy Hawkins | Director | 21 Dec 1993 | 13 Jun 1997 | British | 72 years |
| Alex Raistrick | Secretary | 3 Aug 2020 | 18 Nov 2022 | - | - |
| Alice Read | Secretary | 18 Jul 2005 | 8 Nov 2005 | British | - |
| Andrew Robert John Speak | Director | 28 May 2012 | 23 Sept 2015 | British | 52 years |
| Anthony James Bloomfield | Director | 2 Mar 2009 | 16 Dec 2010 | British | 55 years |
| Bryan Frank Elliott | Director | 21 Dec 1993 | 15 May 2002 | British | 75 years |
| Christine Anne Coe | Director | 25 Jun 2003 | 29 Jul 2003 | British | 72 years |
| Christopher David Spooner | Director | 20 Oct 2008 | 30 Sept 2011 | British | 76 years |
| Danielle Pass | Secretary | 15 Feb 2018 | 14 Jan 2020 | - | - |
| David Quest | Director | 2 Dec 2014 | 9 Oct 2015 | British | 49 years |
| Donald Thomas Smith | Director | 31 Jan 1995 | 29 Jul 2003 | British | 76 years |
| Edward Robert White | Director | 22 Sept 2021 | 20 May 2024 | British | 57 years |
| Frances Julie Niven | Director | 29 Jul 2003 | 18 Jul 2005 | British | 56 years |
| Frances Julie Niven | Secretary | 6 Sept 2004 | 18 Jul 2005 | British | - |
| Frederick Albert Whitehorn | Director | 1 Jul 1997 | 13 May 1999 | British | 72 years |
| Gary Woolfries | Director | 26 Jun 2002 | 29 Jul 2003 | British | 60 years |
| Hannah Elizabeth Shepherd | Secretary | 30 Apr 2010 | 16 Sept 2016 | - | - |
| Helena Margaret Clarke | Director | 1 Jul 1997 | 4 Sept 2000 | British | 65 years |
| Iain Francis Mackinnon | Director | 24 Oct 2011 | 4 Aug 2020 | British | 69 years |
| Ian Simon Jenkins | Director | 10 Nov 2006 | 31 Mar 2019 | British | 63 years |
| James Keith Barton | Secretary | 4 May 1993 | 17 Jul 1995 | British | - |
| James Michael Martin | Director | 26 Jun 2002 | 29 Jul 2003 | British | 66 years |
| James Phillips | Director | 25 Jun 2003 | 29 Jul 2003 | British | 75 years |
| Jane Fahey | Secretary | 26 Apr 2017 | 9 Nov 2017 | - | - |
| Jennie Newbery | Director | 16 Dec 2010 | 28 May 2012 | British | 51 years |
| John Robin Skae | Director | 22 Feb 1992 | 21 Dec 1993 | British | 88 years |
| Jonathan Edwards | Director | 16 Dec 2010 | 2 Dec 2014 | British | 53 years |
| Karsten Olaf Thiem | Director | 25 Nov 2020 | 22 Sept 2021 | German | 47 years |
| Kevin James Davies | Director | 15 Apr 1994 | 13 Jun 1997 | British | 65 years |
| Kevin Oconnor | Director | 1 May 1996 | 5 Nov 1998 | British | 66 years |
| Maria Andrea Colin | Director | 3 Aug 2020 | 25 Nov 2020 | American | 56 years |
| Mark Alexander Trenavin-body | Director | 25 Nov 2020 | 31 Dec 2022 | British | 58 years |
| Mark Peter Winson-pearce | Director | 2 Mar 2009 | 4 Aug 2020 | British | 62 years |
| Mark Raymond Andrews | Director | 26 Jun 2002 | 29 Jul 2003 | British | 73 years |
| Mark Vivian Pearce | Director | 29 Jul 2003 | 6 Sept 2004 | British | 68 years |
| Mark Vivian Pearce | Secretary | 19 Dec 2002 | 6 Sept 2004 | British | - |
| Michael Joseph Coyne | Director | 21 Dec 1993 | 29 Mar 1996 | British | 71 years |
| Michael Stewart Henley | Director | 3 Aug 2020 | 13 Nov 2020 | British | 66 years |
| Nickesha Eliza Graham-burrell | Secretary | 9 Oct 2008 | 30 Apr 2010 | Other | - |
| Nigel Barker | Director | 22 Feb 1992 | 21 Dec 1993 | British | 83 years |
| Nigel Barker | Secretary | 22 Feb 1992 | 4 May 1993 | British | - |
| Pauline Louise Mcquillan | Secretary | 11 Nov 2005 | 30 Oct 2006 | British | - |
| Peter Gordon Taylor | Director | 2 Mar 2009 | 16 Dec 2010 | British | 61 years |
| Peter Gordon Taylor | Director | 16 Dec 2010 | 6 Mar 2015 | British | 61 years |
| Philip William Richardson | Director | 1 May 1998 | 26 Jun 2002 | British | 66 years |
| Richard Ian Crews | Director | 15 Apr 1994 | 31 Jan 1995 | British | 75 years |
| Robert Harvey Muth | Director | 18 Jul 2005 | 25 Jan 2008 | American | 74 years |
| Robert Hugh Musgrove | Director | 6 Sept 2004 | 18 Jul 2005 | Other | 59 years |
| Robert Hugh Musgrove | Secretary | 6 Aug 1999 | 19 Dec 2002 | Other | - |
| Russell Clive Picot | Director | 18 Jul 2005 | 9 Oct 2015 | British | 69 years |
| Sarah Caroline Gott | Secretary | 30 Oct 2006 | 9 Oct 2008 | British | - |
| Shaun Kevin Bryant | Secretary | 17 Jul 1995 | 6 Aug 1999 | British | - |
| Sheryl Muniz | Director | 1 May 1996 | 1 May 1998 | English | 61 years |
| Sheryl Slater | Director | 2 Mar 2009 | 1 Jul 2010 | British | 57 years |
| Simon John Parsons | Director | 16 Jan 2023 | 30 Sept 2025 | British | 50 years |
| Stephen Charles Crockford | Director | 31 Jan 1995 | 26 Jun 2002 | British | 75 years |
| Stephen Walter Gamble | Director | 26 Jun 2002 | 25 Jun 2003 | British | 76 years |
| Terry Frederick Cox | Director | 22 Feb 1992 | 21 Dec 1993 | British | 91 years |
| Troy Dehmann | Director | 6 Mar 2015 | 26 Sept 2018 | American | 58 years |
| Yvonne Marie Walters-pollard | Director | 18 Jul 2005 | 10 Nov 2006 | American | 74 years |