| Alan Raymond Austin | Director | 11 Mar 1993 | 24 Apr 1995 | British | 78 years |
| Alan Raymond Austin | Director | 12 Mar 1993 | 24 Apr 1995 | British | 78 years |
| 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 |
| Bernard Henry Alder | Director | 15 Jun 2001 | 31 Dec 2001 | British | 80 years |
| Frances Clare Maclachlan | Director | 15 Oct 2015 | 30 Apr 2025 | British | 56 years |
| Gabriel L Shaheen | Director | 11 Dec 1996 | 28 Jan 1998 | American | 73 years |
| Gerald James Hodson | Director | 10 May 2010 | 7 Sept 2015 | British | 69 years |
| Hayden Richard Matthews | Director | 1 Jan 2022 | 1 Apr 2024 | British | 64 years |
| Janet Christine Fuller | Director | 1 Oct 2009 | 10 May 2010 | British Canadian | 69 years |
| Jeffrey Joseph Nick | Director | 24 Apr 1995 | 11 Dec 1996 | American | 73 years |
| Jonathan Glyn Vickers | Director | 17 Jan 2001 | 31 Jul 2002 | British | 64 years |
| Malcolm George William Wilson | Secretary | 30 Sept 2000 | 2 Mar 2001 | British | - |
| Margaret Fleur Hobbs | Director | 25 Apr 2007 | 10 May 2010 | British | 64 years |
| 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 1993 | 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 |
| Philip Charles Whitefield | Director | 22 Jul 2002 | 31 Mar 2007 | British | 67 years |
| Roland Gordon Ward | Director | 12 Mar 1993 | 24 Apr 1995 | British | 81 years |
| Victor Bee | Director | 10 May 2010 | 30 Sept 2014 | British | 69 years |
