| Adrian Keith Dawson | Director | 30 Apr 1991 | 31 Aug 2000 | British | 83 years |
| Alexander Siu Kee Au | Director | 2 Jul 1998 | 30 Jul 1998 | British Citizen | 80 years |
| Anthony Clifford Webb | Director | 30 Apr 1991 | 30 Jan 1998 | British | 88 years |
| Brendan Patrick Paul Blake | Director | 30 Apr 1991 | 16 Jan 2000 | British | 79 years |
| Christopher Gowland | Director | 1 May 2023 | 6 Dec 2024 | British | 49 years |
| Christopher Sutton | Director | 24 Aug 2012 | 9 Jul 2015 | British | 68 years |
| Claude Kwasi Sarfo-agyare | Director | 31 Jul 2012 | 25 Jun 2018 | British | 57 years |
| Colin Geoffrey Hicks | Secretary | 30 Apr 1991 | 3 May 1991 | British | - |
| Damian Charles Stansfield | Director | 7 Jul 2017 | 31 May 2018 | British | 60 years |
| David Dermot Hennessey | Secretary | 7 Jun 2017 | 8 Jan 2024 | - | - |
| David James Stanley Oldfield | Director | 19 Dec 2006 | 21 Nov 2012 | British | 64 years |
| David John Morgan | Director | 17 Sept 1998 | 31 Aug 2000 | British | 69 years |
| David Keith Potts | Director | 31 Aug 2000 | 28 Sept 2007 | British | 75 years |
| David Peter Brougham | Director | 3 May 1991 | 31 Dec 1997 | British | 86 years |
| David Peter Pritchard | Director | 31 Aug 2000 | 21 Aug 2003 | British | 82 years |
| David Stewart Gow | Director | 20 Jan 1995 | 21 Dec 2000 | British | 76 years |
| David Stewart Gow | Secretary | 3 May 1991 | 8 May 2000 | British | - |
| Deborah Ann Saunders | Secretary | 30 Apr 2008 | 6 Jan 2010 | Other | - |
| Fred Clark Enlow | Director | 2 Jul 1998 | 31 Aug 2000 | American | 86 years |
| Gareth Richard Bullock | Director | 1 Jul 1996 | 30 Jul 1999 | British | 73 years |
| George Truett Tate | Director | 30 Apr 2004 | 6 Feb 2012 | American | 76 years |
| Israel Santos Perez | Director | 9 Dec 2019 | 24 Feb 2023 | Spanish | 54 years |
| Jakob Pfaudler | Director | 21 Nov 2012 | 14 Dec 2015 | Austrian | 54 years |
| Jeffrey Anthony Roberts | Director | 3 Mar 1997 | 14 Sept 2000 | British | 75 years |
| Joanna Kate Harris | Director | 9 Dec 2019 | 30 Apr 2023 | British | 53 years |
| John Hoddell | Director | 30 Apr 1991 | 4 Apr 1992 | British | 97 years |
| John Lewis Davies | Director | 4 Feb 1997 | 17 Dec 1999 | British | 77 years |
| John Lewis Davies | Director | 31 Aug 2000 | 18 Dec 2006 | British | 77 years |
| John Mackenzie | Director | 30 Apr 1991 | 16 Sept 1991 | British | 86 years |
| Kim Morris | Director | 18 Dec 2020 | 31 Oct 2024 | British | 51 years |
| Mark Andrew Stokes | Director | 16 Feb 2000 | 25 Feb 2000 | British | 64 years |
| Michael Charles Hart | Director | 30 Apr 1991 | 31 Jan 1993 | South African | 75 years |
| Michael Peter Kilbee | Secretary | 29 May 2001 | 30 Apr 2008 | British | - |
| Paul Anthony Barry | Director | 30 Apr 1991 | 8 Sept 2000 | British | 74 years |
| Paul Gittins | Secretary | 2 Oct 2013 | 7 Jun 2017 | - | - |
| Paul Gittins | Secretary | 19 Jan 2024 | 31 Jul 2024 | - | - |
| Paula Frain | Secretary | 8 May 2000 | 29 May 2001 | British | - |
| Peter Nigel Kenny | Director | 15 Sept 1994 | 1 Jul 1996 | British | 78 years |
| Philip John Stones | Director | 24 Jun 1997 | 11 Feb 2000 | British | 80 years |
| Philip Robert Grant | Director | 20 May 2016 | 7 Jul 2017 | British | 60 years |
| Philippe Marcel Etienne Paillart | Director | 2 Jan 1998 | 30 Jun 1998 | French | 75 years |
| Raymond John Hildreth Milne | Director | 23 Aug 2018 | 14 Mar 2021 | British | 67 years |
| Richard Andrew Hunter | Director | 17 Dec 1999 | 31 Aug 2000 | British | 76 years |
| Richard Andrew Jones | Director | 14 Dec 2015 | 28 Oct 2022 | British | 54 years |
| Stephen Craig Targett | Director | 21 Aug 2003 | 30 Apr 2004 | Australian | 71 years |
| Stewart Edmund Davies | Director | 3 Mar 1997 | 13 Oct 2000 | British | 82 years |
| Timothy Mark Blackwell | Director | 28 Sept 2007 | 21 Jun 2011 | British | 57 years |
| William John Franklin | Director | 30 Apr 1991 | 20 Feb 1997 | British | 99 years |