| Alison Ann Hargreaves | Secretary | 9 Aug 1993 | 13 Aug 1999 | British | - |
| Andrew Thomas Taylor | Director | 16 Dec 2020 | 31 Mar 2022 | British | 39 years |
| Andrew Thomas Taylor | Director | 1 Aug 2022 | 20 Oct 2023 | British | 39 years |
| Caroline Mary Tolhurst | Secretary | 13 Aug 1999 | 1 Jul 2008 | British | - |
| Catherine Susan Stevenson | Director | 15 Nov 2010 | 7 Nov 2013 | British | 43 years |
| Chantal Antonia Henderson | Director | 17 Oct 2014 | 25 Jun 2021 | British | 51 years |
| Christopher James Jukes | Director | 1 Aug 2022 | 30 Nov 2022 | British | 48 years |
| Colin John Redman | Director | 12 May 1998 | 10 Apr 2000 | British | 80 years |
| Craig David Mcwilliam | Director | 28 Apr 2016 | 10 Jan 2020 | British | 54 years |
| Darren James Patrick Rawcliffe | Director | 1 Feb 2006 | 31 Dec 2008 | British | 58 years |
| Derek John Lewis | Secretary | 7 Jun 2018 | 3 Sept 2021 | - | - |
| Derek John Lewis | Director | 16 Dec 2020 | 31 Mar 2022 | British | 62 years |
| Gary James Powell | Director | 2 Mar 2009 | 3 Dec 2012 | British | 52 years |
| Geoffrey Hammond | Director | 26 Jul 1991 | 12 May 1998 | British | 87 years |
| Giles Andrew Clarke | Director | 1 Oct 2007 | 7 Nov 2013 | British | 59 years |
| Haydn John Cooper | Director | 4 Jun 2013 | 7 Nov 2013 | British | 45 years |
| Ian Douglas Mair | Director | 3 Dec 2012 | 20 Jun 2014 | British | 53 years |
| Jenefer Dawn Greenwood | Director | 15 Nov 2010 | 31 Dec 2012 | British | 69 years |
| Jeremy Henry Moore Newsum | Director | 12 Mar 1993 | 10 Apr 2000 | British | 71 years |
| John Edward Thompson Clark | Director | 1 Jul 2008 | 7 Nov 2013 | British | 57 years |
| John Garnett Wright | Director | 12 May 1998 | 10 Apr 2000 | British | 80 years |
| John James | Director | 26 Jul 1991 | 12 Mar 1993 | British | 91 years |
| Jonathan Osborne Hagger | Director | 26 Jul 1991 | 10 Apr 2000 | British | 77 years |
| Julian Richard Milne | Director | 12 May 1998 | 26 May 2006 | British | 70 years |
| Katharine Emma Robinson | Secretary | 1 Jul 2008 | 7 Jun 2018 | British | - |
| Lauren Ruth Buck | Director | 25 Jul 2006 | 15 Nov 2010 | British | 55 years |
| Mark Robin Preston | Director | 30 Jun 2006 | 30 Jun 2008 | British | 58 years |
| Matthew David Buller Smith | Director | 1 Apr 2022 | 31 Oct 2022 | British | 39 years |
| Nigel Auriol Hughes | Director | 15 Nov 2010 | 7 Nov 2013 | British | 69 years |
| Oliver Barry Kemp Fenn Smith | Director | 1 Oct 1999 | 13 Sept 2002 | British | 61 years |
| Peter Sean Vernon | Director | 7 Apr 2005 | 31 Dec 2016 | British | 67 years |
| Raymond Charles Williams | Director | 12 May 1998 | 1 Feb 2006 | British | 73 years |
| Richard Simon Handley | Director | 10 Apr 2000 | 3 Apr 2008 | British | 72 years |
| Roger Frederick Crawford Blundell | Director | 3 Apr 2008 | 25 Jun 2021 | British | 64 years |
| Sarah-jane Curtis | Director | 13 Sept 2002 | 15 Nov 2010 | British | 63 years |
| Sarah-jane Curtis | Director | 16 Nov 2010 | 16 Nov 2010 | British | 63 years |
| Simon Geoffrey Harding-roots | Director | 28 Apr 2016 | 30 Jun 2020 | British | 58 years |
| Simon Richard Elmer | Director | 10 Jul 2009 | 7 Nov 2013 | British | 62 years |
| Stephen Howard Rhodes Musgrave | Director | 10 Apr 2000 | 30 Jun 2006 | British | 73 years |
| Tim Reade | Director | 15 Nov 2010 | 7 Nov 2013 | British | 57 years |
| Ulrike Schwarz-runer | Director | 1 Feb 2011 | 28 Apr 2016 | Austrian | 55 years |
| Victoria Herring | Director | 15 Nov 2010 | 25 Apr 2013 | British | 52 years |
| William Robert Bax | Director | 1 Feb 2011 | 7 Nov 2013 | British | 48 years |
| William Robert Holland | Secretary | 26 Jul 1991 | 9 Aug 1993 | British | - |