| Adrian John Mardell | Director | 1 Jun 2019 | 30 Jun 2023 | British | 64 years |
| Bibiana Boerio | Director | 31 Jul 1995 | 1 Oct 2000 | United States | 71 years |
| Charles Gilbert Vacy Ash | Director | 11 Oct 2001 | 8 Jun 2007 | British | 79 years |
| Charles Stephen Woolard | Director | 1 Oct 2000 | 31 Dec 2001 | Usa | 72 years |
| Clive Charles Page | Secretary | 27 Mar 1995 | 2 Jun 2008 | British | - |
| David Arthur Perry | Director | 4 Sept 1992 | 4 Oct 2001 | British | 83 years |
| David Arthur Perry | Secretary | 4 Sept 1992 | 27 Mar 1995 | British | - |
| David Fielden | Director | 28 Sept 1991 | 30 Sept 1991 | British | 87 years |
| David Miles Smith | Director | 1 Jan 2002 | 8 Feb 2010 | British | 64 years |
| James Neville Randle | Director | 28 Sept 1991 | 30 Nov 1991 | British | 87 years |
| John Frederick Edwards | Director | 30 Sept 1991 | 31 Jul 1995 | British | 77 years |
| Jonathan Edward Osgood | Director | 8 Jun 2007 | 30 Jun 2008 | British | 58 years |
| Jonathan Edward Osgood | Secretary | 13 Jul 2005 | 30 Jun 2008 | British | - |
| Keith John Benjamin | Director | 8 Feb 2010 | 22 Sept 2022 | British | 69 years |
| Kenneth David Matheson Gregor | Director | 30 Jun 2008 | 1 Jun 2019 | British | 58 years |
| Michael Charles Stewart Edwards | Secretary | 24 Oct 2002 | 28 Oct 2011 | Other | - |
| Michael Francis Marecki | Secretary | 24 Oct 2002 | 30 Jun 2005 | British | - |
| Richard Martin Alistair Bielby | Secretary | 29 Aug 2007 | 21 Sept 2018 | Other | - |
| Robert Murray Grant | Secretary | 28 Sept 1991 | 30 Sept 1991 | British | - |
| Stephen John Cox | Director | 1 Dec 1991 | 4 Sept 1992 | British | 66 years |
| Susan Lesley Pearson | Secretary | 26 Feb 1999 | 31 Mar 2019 | Other | - |