| Adrian Patrick White | Director | 30 Apr 2008 | 19 Sept 2011 | British | 59 years |
| Allison Jane Currie | Secretary | 12 Mar 2012 | 6 Jul 2012 | - | - |
| Bertil Derrick Bos | Director | 3 Jul 2017 | 2 Oct 2025 | Dutch | 52 years |
| Brian John Marsh | Secretary | 19 Apr 1992 | 17 Mar 1995 | British | - |
| Christopher Sutton | Director | 21 Nov 2012 | 18 Aug 2015 | British | 68 years |
| Claude Kwasi Sarfo-agyare | Director | 1 Feb 2010 | 25 Jun 2018 | British | 57 years |
| David Anthony Baggaley | Director | 30 Jun 1997 | 6 Mar 1998 | British | 83 years |
| David Dermot Hennessey | Secretary | 8 Sept 2016 | 8 Jan 2024 | - | - |
| David James Stanley Oldfield | Director | 19 Dec 2006 | 21 Nov 2012 | British | 64 years |
| David Jarvis | Secretary | 15 Sept 2003 | 1 Oct 2009 | British | - |
| David Keith Potts | Director | 19 Apr 1992 | 30 Jun 1997 | British | 75 years |
| David Keith Potts | Director | 4 May 2000 | 28 Sept 2007 | British | 75 years |
| Gordon Ferguson | Director | 1 Feb 2010 | 30 Nov 2020 | British | 63 years |
| James Michael Bury | Director | 12 Apr 1999 | 14 Apr 2000 | British | 65 years |
| John Howard Ross | Secretary | 17 Mar 1995 | 30 Jun 1997 | British | - |
| John Lewis Davies | Director | 19 Apr 1992 | 22 Jan 1997 | British | 77 years |
| John Lewis Davies | Director | 1 Jan 2000 | 18 Dec 2006 | British | 77 years |
| John Richard Whittington | Director | 9 Feb 1995 | 16 Jun 1997 | British | 81 years |
| Martin Francis Fleming | Director | 19 Dec 2014 | 5 Dec 2016 | Irish | 58 years |
| Michael David Whytock | Director | 10 Jul 2020 | 29 Mar 2023 | British | 60 years |
| Michael John David Griffiths | Director | 21 Nov 2012 | 19 Dec 2014 | British | 77 years |
| Michael Peter Kilbee | Director | 6 Mar 1998 | 30 Apr 2008 | British | 79 years |
| Michael Peter Kilbee | Secretary | 30 Jun 1997 | 29 Mar 1999 | British | - |
| Paul Gittins | Secretary | 2 Oct 2013 | 8 Sept 2016 | - | - |
| Paul Gittins | Secretary | 23 Jan 2024 | 31 Jul 2024 | - | - |
| Peter Francis Hook | Director | 22 Jan 1997 | 31 Dec 1999 | British | 82 years |
| Philip Robert Grant | Director | 16 Sept 2015 | 25 May 2017 | British | 60 years |
| Raymond Poole | Director | 9 Apr 2019 | 12 May 2021 | British | 63 years |
| Robert Austin Connor | Secretary | 29 Mar 1999 | 15 Sept 2003 | British | - |
| Stephen John Hopkins | Secretary | 1 Oct 2009 | 28 Feb 2010 | British | - |
| Timothy Mark Blackwell | Director | 28 Sept 2007 | 21 Jun 2011 | British | 57 years |