| Benjamin Nathan Rowe | Director | 24 Apr 1995 | 15 Jun 2001 | British | 79 years |
| Bernard George Brown | Director | 28 Jan 1998 | 17 Jan 2001 | British | 75 years |
| Clive Anthony Lindemann | Director | 12 Mar 1992 | 31 Dec 1994 | British | 74 years |
| Frances Clare Maclachlan | Director | 27 Jan 2021 | 30 Apr 2025 | British | 56 years |
| Gabriel L Shaheen | Director | 11 Dec 1996 | 28 Jan 1998 | American | 73 years |
| Hayden Richard Matthews | Director | 1 Jan 2022 | 1 Apr 2024 | British | 64 years |
| Janet Christine Fuller | Director | 1 Oct 2009 | 1 Oct 2009 | British Canadian | 69 years |
| Janet Christine Fuller | Director | 1 Oct 2009 | 3 May 2013 | British Canadian | 69 years |
| Jeffrey Joseph Nick | Director | 24 Apr 1995 | 11 Dec 1996 | American | 73 years |
| John Baird Sherriff | Director | 17 Sept 1991 | 24 Apr 1995 | British | 90 years |
| Jonathan Glyn Vickers | Director | 17 Jan 2001 | 31 Jul 2002 | British | 64 years |
| Malcolm George William Wilson | Secretary | 30 Sept 2000 | 30 Sept 2000 | British | - |
| Malcolm George William Wilson | Secretary | 30 Sept 2000 | 2 Mar 2001 | British | - |
| Margaret Fleur Hobbs | Secretary | 2 Mar 2001 | 1 Apr 2024 | British | - |
| Mark Lupton Dawbarn | Director | 24 Apr 1995 | 30 Sept 2000 | British | 89 years |
| Mark Lupton Dawbarn | Secretary | 24 Apr 1995 | 30 Sept 2000 | British | - |
| Mary Elizabeth Jane Garnell | Secretary | 12 Mar 1992 | 24 Apr 1995 | British | - |
| Michael Robert Geoffrey Tallett Williams | Director | 26 Nov 1996 | 1 Oct 2009 | British | 73 years |
| Neville Dean Kent | Director | 31 Jul 2002 | 31 Dec 2021 | British | 66 years |
| Robert Jeffrey Payne | Director | 3 May 2013 | 27 Jan 2021 | British | 59 years |
| Roland Gordon Ward | Director | 16 Dec 1994 | 24 Apr 1995 | British | 81 years |
| Stephen Gerald Lindemann | Director | 12 Mar 1992 | 31 Dec 1994 | British | 83 years |
