| Alain Gerard Edmond Bourguignon | Director | 1 Apr 2010 | 1 Mar 2011 | French | 67 years |
| Alan Lockwood Shearer | Director | N/A | 6 Jun 1997 | British | 87 years |
| Andrew Hubert Teare | Director | N/A | 31 May 1994 | British | 84 years |
| Andrew Nash | Secretary | 30 Oct 1998 | 26 May 2000 | British | - |
| Christopher Mark Hudson | Director | 18 Dec 2019 | 6 Jan 2020 | British | 68 years |
| Christopher Stuart Bailey | Director | 6 Jun 1997 | 31 Dec 2004 | British | 80 years |
| Christopher Stuart Bailey | Director | N/A | 31 Jul 1994 | British | 80 years |
| David Tidmarsh | Director | 9 May 1994 | 2 Jan 2001 | British | 81 years |
| George William Bolsover | Director | 2 Jan 2001 | 31 Mar 2010 | British | 76 years |
| Howard Robert Grant | Director | 1 Dec 1995 | 29 Dec 2000 | British | 71 years |
| James Keith Retallack | Director | 29 Mar 2010 | 30 Jun 2011 | British | 69 years |
| James West Atherton-ham | Director | 1 Jul 2011 | 30 Apr 2019 | British | 56 years |
| Joan Simpson | Secretary | N/A | 31 Jul 1997 | English | - |
| John Ferguson Bowater | Director | 31 Dec 2004 | 31 Dec 2022 | British | 77 years |
| John Walker Inglis | Director | N/A | 31 Mar 1996 | British | 90 years |
| Mary Ford | Secretary | 26 May 2000 | 30 Mar 2012 | British | - |
| Michael Eugene Hayes | Director | N/A | 31 Jul 1994 | American | 90 years |
| Michael Robert Green | Director | N/A | 30 Jan 1997 | British | 86 years |
| Peter William Gregory Tom | Director | 26 Jun 1997 | 31 Dec 2005 | British | 86 years |
| Philip Bowden | Director | 3 Oct 1994 | 6 Jun 1997 | British | 72 years |
| Richard Hawke Collins | Secretary | 16 Jan 1997 | 3 Jul 1998 | British | - |
| Timothy David Blair Harrison | Director | N/A | 1 Oct 1994 | British | 82 years |
| Timothy Nicholas Grimes | Director | 7 Feb 2000 | 29 Jul 2005 | British | 73 years |
| Timothy Nicholas Grimes | Secretary | 3 Jul 1998 | 30 Oct 1998 | British | - |