| Alan Peter Mackenzie Lamb | Director | 3 Oct 2011 | 23 May 2014 | British | 77 years |
| Andrew Bruce Carruthers | Director | 27 Jun 2007 | 1 Jan 2011 | British | 60 years |
| Andrew Peter Geoffrey Holmes | Director | 21 Dec 1995 | 31 Jan 2005 | British | 82 years |
| Andrew Peter Geoffrey Holmes | Director | 13 Feb 2006 | 2 Jun 2008 | British | 82 years |
| Basil Thomas Richard Scruby | Director | 21 Dec 1995 | 20 Jun 2006 | British | 91 years |
| Christopher Wright | Director | 13 Jul 2005 | 8 May 2009 | British | 69 years |
| David William Quysner | Director | 29 Jun 2005 | 20 Jul 2005 | British | 80 years |
| David Yeates Adams | Director | 30 Mar 2009 | 19 Apr 2011 | British | 71 years |
| Fiona Elizabeth Wollocombe | Director | 1 May 2019 | 19 Dec 2024 | British | 63 years |
| Glynne Stanfield | Director | 18 Dec 1995 | 21 Dec 1995 | British | 65 years |
| Glynne Stanfield | Secretary | 18 Dec 1995 | 21 Dec 1995 | British | - |
| Gregory Kilborn Lockwood | Director | 30 Mar 2009 | 7 May 2010 | Canadian | 64 years |
| John Arthur Spooner | Director | 21 Dec 1995 | 31 Jan 2005 | British | 73 years |
| John Chiplin | Director | 1 Nov 2021 | 1 Jan 2023 | British | 68 years |
| John David Birney | Director | 29 Jun 2005 | 8 May 2009 | British | 82 years |
| Martin Guy Fiennes | Director | 5 Apr 2011 | 9 Jun 2022 | British | 65 years |
| Martin Gwynne Williams | Secretary | 12 Dec 2000 | 1 Sept 2005 | British | - |
| Martin William Sherwood | Director | 18 Dec 1995 | 21 Dec 1995 | British | 82 years |
| Nghi Thuy Tran | Secretary | 9 Mar 2007 | 1 Jan 2011 | British | - |
| Patricia Cox | Secretary | 21 Dec 1995 | 18 Oct 1999 | British | - |
| Patrick Harold Reeve | Director | 1 Jan 2011 | 3 Oct 2011 | British | 66 years |
| Richard John Drover | Secretary | 18 Oct 1999 | 12 Dec 2000 | British | - |
| Richard John Drover | Secretary | 1 Sept 2005 | 9 Mar 2007 | British | - |
| Richard Jullion Prest | Director | 25 Jan 1996 | 25 May 2000 | British | 80 years |
| Robin Anthony Field | Director | 21 Jan 2009 | 10 Jun 2021 | British | 75 years |
| Simon Charles Thorpe | Director | 1 Sept 2023 | 19 Dec 2024 | British | 67 years |
| Simon Macalister Bakewell | Director | 21 Dec 1995 | 29 Jun 2005 | British | 71 years |
| Swarupa Gaurang Pathakji | Director | 1 Nov 2021 | 19 Dec 2024 | British | 47 years |
| Thomas Peter Sooke | Director | 1 Feb 1996 | 8 May 2009 | British | 81 years |
| Thomas William Chambers | Director | 3 Oct 2011 | 5 Jun 2024 | British | 65 years |