| Alison Edwina Crowe | Director | 25 Aug 1991 | 28 Aug 1998 | British | 68 years |
| Alison Edwina Crowe | Secretary | 25 Aug 1991 | 10 May 1994 | British | - |
| Amanda Jane Bruce | Secretary | 30 Apr 2008 | 26 Mar 2015 | Other | - |
| Andrew John Lattaney Peake | Secretary | 28 Aug 1998 | 30 Apr 2003 | British | - |
| Carla Marie Hammond | Director | 8 Mar 2023 | 23 May 2025 | American | 42 years |
| Christopher Mackintosh Ireland | Director | 29 Aug 1995 | 8 Mar 2023 | British | 68 years |
| Gary James Yardley | Director | 1 May 2002 | 30 Apr 2007 | British | 60 years |
| James Robert Addison | Director | 8 Mar 2023 | 30 Apr 2025 | British | 35 years |
| Malcolm James Geoffrey King | Director | 29 Aug 1995 | 30 Apr 2006 | British | 80 years |
| Mark Richard Perowne | Director | 15 Aug 2006 | 30 Apr 2010 | British | 73 years |
| Mark Stupples | Director | 30 Apr 2010 | 31 Dec 2016 | British | 63 years |
| Richard Alan Fox | Director | 25 Aug 1991 | 28 Aug 1998 | British | 80 years |
| Richard Alan Fox | Secretary | 10 May 1994 | 28 Aug 1998 | British | - |
| Richard Charles Batten | Director | 20 Dec 2005 | 8 Mar 2023 | British | 71 years |
| Richard Martin Fiddes | Director | 10 Oct 2006 | 1 Oct 2012 | British | 63 years |
| Simon Alexander Farquhar Bailey | Director | 30 Apr 2008 | 1 Dec 2011 | British | 67 years |
| Simon Alexander Farquhar Bailey | Secretary | 30 Apr 2003 | 30 Apr 2008 | British | - |
| Stephanie Tricia Hyde | Director | 22 Jul 2024 | 30 Apr 2025 | British | 52 years |