| Ali Reza Toutounchi | Director | 10 May 2016 | 1 Nov 2021 | British | 68 years |
| Andrew David Clare | Director | 10 Sept 2019 | 15 Nov 2022 | British | 60 years |
| Andrew David Fairhurst | Secretary | 23 Aug 1993 | 19 Sept 2001 | British | - |
| Andrew David Fairhurst | Secretary | 30 Jun 2006 | 4 May 2010 | British | - |
| Andrew Stuart Mckinnon | Director | 1 May 2001 | 10 Dec 2002 | British | 59 years |
| Brian Metters | Director | 30 May 1993 | 10 Oct 1994 | British | 79 years |
| Carol Ann Dockrell | Secretary | 19 Sept 2001 | 30 Jun 2006 | British | - |
| Carolyn Elizabeth Rees | Director | 14 Jan 2005 | 7 Nov 2007 | British | 57 years |
| Catherine Rosemary Reid Avery | Director | 1 Jan 1998 | 11 Jun 1998 | British | 66 years |
| Catherine Rosemary Reid Avery | Director | 27 Sept 2000 | 1 Nov 2001 | British | 66 years |
| Catherine Rosemary Reid Avery | Director | 10 Aug 2006 | 28 Jan 2009 | British | 66 years |
| Christopher Charles Hatry | Director | 30 May 1992 | 17 Dec 1997 | British | 77 years |
| Christopher Michael Radford | Director | 7 Feb 2007 | 1 Mar 2009 | British | 68 years |
| Christopher Thomas Richards | Director | 11 Jun 1998 | 16 Oct 1998 | British | 75 years |
| David Rough | Director | 30 May 1992 | 31 Dec 2001 | British | 75 years |
| Duncan Crocker | Director | 30 May 1993 | 11 Jun 1998 | British | 68 years |
| Eimear Cowhey | Director | 9 Oct 2019 | 10 Sept 2025 | Irish | 60 years |
| Francis David Hoffman | Director | 12 Jan 1998 | 25 Jun 1999 | British | 74 years |
| Gareth John Hoskin | Director | 27 Jan 2000 | 11 Dec 2003 | British | 66 years |
| Graham Edward West | Director | 19 Jun 1995 | 11 Jun 1998 | British | 83 years |
| Graham Trevor Anthony Newitt | Director | 1 Nov 2006 | 7 Nov 2007 | British | 66 years |
| Helena Louise Morrissey | Director | 5 Jul 2017 | 18 Oct 2019 | British | 60 years |
| Honor Julia Eli Solomon | Director | 13 Mar 2015 | 11 Oct 2021 | British | 48 years |
| James Michael Bury | Director | 6 May 2003 | 6 Dec 2006 | British | 65 years |
| James Michael Bury | Director | 18 Jan 2008 | 31 Jul 2008 | British | 65 years |
| Jamshaid Islam | Director | 26 Jun 2015 | 15 Jan 2016 | British | 51 years |
| Jeffrey William Hodgson | Director | 30 May 1992 | 16 Dec 1992 | British | 76 years |
| John Brackenridge Pollock | Director | 11 Dec 2003 | 10 Aug 2006 | British | 68 years |
| Jonathan Paul Maguire | Director | 19 Jun 1995 | 11 Jun 1998 | British | 66 years |
| Lee William Toms | Director | 23 May 2016 | 9 Sept 2024 | British | 61 years |
| Margaret Ann Smith | Director | 28 Sept 1995 | 1 Jan 1998 | British | 77 years |
| Mark Jordy | Director | 24 Mar 2021 | 31 May 2022 | American | 67 years |
| Mark Joseph Zinkula | Director | 24 Jan 2014 | 15 Jul 2019 | American | 59 years |
| Mark Julian Gregory | Director | 20 Mar 2009 | 1 Sept 2013 | British | 63 years |
| Martin David Pengilly | Director | 9 Feb 2005 | 8 Oct 2007 | British | 59 years |
| Michael Anthony Christopher Hayden | Director | 30 May 1992 | 1 Nov 2001 | Irish | 64 years |
| Michael Bryan Boardman | Director | 25 Mar 2009 | 3 May 2013 | British | 67 years |
| Michael John Payne | Director | 16 Dec 1992 | 19 Jun 1995 | British | 81 years |
| Michael Joseph Davies | Director | 20 Jul 1998 | 22 Nov 2000 | British | 58 years |
| Michael William Dedman | Director | 10 Dec 2002 | 30 Apr 2007 | British | 78 years |
| Neville Russell Walton | Director | 30 May 1992 | 16 Dec 1992 | British | 73 years |
| Peter Julian Lomax | Director | 13 Nov 1997 | 1 Nov 2001 | British | 83 years |
| Peter Robert Knapton | Director | 4 Jul 1994 | 29 Jun 2001 | British | 77 years |
| Rhodri Rhys Mason | Director | 5 May 2022 | 15 Jan 2025 | British | 50 years |
| Robert Peter Sewell | Director | 1 Nov 2001 | 27 Mar 2007 | Irish | 62 years |
| Roger Michael Bartley | Director | 15 May 2015 | 31 Dec 2018 | British | 74 years |
| Simon Andrew Hynes | Director | 29 Jun 2016 | 30 Apr 2021 | British | 58 years |
| Simon Charles Ellis | Director | 5 Oct 2009 | 18 Jan 2013 | British | 67 years |
| Simon James Thompson | Director | 10 Feb 2015 | 5 Feb 2016 | British | 59 years |
| Simon John Cartlidge | Director | 29 Oct 2004 | 7 Nov 2007 | Welsh | 55 years |
| Simon Neil Hudson Lund | Director | 24 Sept 1998 | 6 May 2003 | British | 65 years |
| Simon Robert Pistell | Director | 21 Nov 2001 | 29 Jun 2015 | British | 59 years |
| Stephen Anthony Ince | Director | 10 Oct 1994 | 11 Jun 1998 | British | 79 years |
| Stephen Charles Abbott | Director | 16 Dec 1992 | 11 Jun 1998 | British | 71 years |
| Stephen David Thomas | Director | 8 Oct 2007 | 17 Oct 2018 | British | 62 years |
| Stephen Whiteside | Director | 8 Jul 2002 | 30 Apr 2004 | British | 70 years |
| Thomas Andrew Forwood Smith | Secretary | 30 May 1992 | 23 Aug 1993 | British | - |
| Trevor Cheal | Director | 1 May 2001 | 1 Nov 2001 | British | 62 years |