| Barbara Ann Cooper | Secretary | 15 Feb 1991 | 17 Sept 2002 | British | - |
| David Gresford Belmont | Secretary | 9 Apr 2008 | 19 Jan 2009 | British | - |
| David Michael Barry | Director | 1 May 1992 | 1 May 1995 | British | 84 years |
| Geoffrey Malcolm Townsend | Director | 15 Feb 1991 | 30 Apr 1992 | British | 99 years |
| Martin Stephen Jeremy Lathom-sharp | Director | 1 Nov 2011 | 1 Nov 2023 | British | 58 years |
| Martin Stephen Jeremy Lathom-sharp | Secretary | 17 Sept 2002 | 1 Nov 2023 | British | - |
| Robert Jeffrey Smith | Director | 15 Feb 1991 | 30 Apr 1999 | British | 86 years |
| Thomas Niall Ledlie Harrison | Director | 3 May 2005 | 30 Apr 2017 | British | 71 years |
| Timothy Gordon Wray | Director | 1 May 1995 | 1 May 2011 | British | 77 years |
| William Alistair Wilson | Director | 1 May 1999 | 3 May 2005 | British | 80 years |
