| Andrew Michael Stoddart | Director | 1 Feb 1998 | 28 Dec 2000 | British | 80 years |
| Angela Claire Bromfield | Director | 1 Oct 2010 | 11 Oct 2013 | British | 64 years |
| Bruno Valentine Speed | Director | 2 Sept 2002 | 31 May 2006 | British | 70 years |
| Christopher John Hughes | Director | 2 Sept 2002 | 21 Jan 2014 | British | 70 years |
| Clare Sheridan | Secretary | 28 Dec 2000 | 27 Jun 2024 | British | - |
| David Kevin Mulligan | Director | 28 Dec 2000 | 27 Sept 2001 | British | 57 years |
| David Kevin Mulligan | Director | 1 Apr 2004 | 25 Feb 2013 | British | 57 years |
| Derek Peter Hornby | Director | 13 Oct 1991 | 30 Oct 1996 | British | 96 years |
| Graham Alexander Shennan | Director | 20 May 2010 | 29 Oct 2014 | British | 71 years |
| Graham Nicolas Grundon | Director | 27 Sept 2001 | 20 Mar 2007 | British | 79 years |
| Helen Mary Mason | Secretary | 27 Jun 2024 | 22 Apr 2025 | - | - |
| Isobel Mary Nettleship | Secretary | 1 Jun 2005 | 31 May 2014 | British | - |
| James Francis Power | Director | 13 Oct 1991 | 10 May 1995 | British | 94 years |
| John Bright | Director | 2 Sept 2002 | 2 Jun 2006 | British | 74 years |
| John Christopher Morgan | Director | 13 Oct 1991 | 28 Dec 2000 | British | 71 years |
| John Ellis | Director | 25 Jul 2006 | 30 Sept 2010 | British | 67 years |
| John James Clifford Lovell | Director | 13 Oct 1991 | 28 Dec 2000 | British | 71 years |
| John Michael Bishop | Director | 29 Mar 1993 | 1 Jun 2005 | British | 81 years |
| Joseph John Ledwidge | Director | 27 Nov 2012 | 21 Aug 2017 | British | 56 years |
| Mark Lloyd Cutler | Director | 20 Feb 2006 | 31 May 2010 | British | 58 years |
| Martin Clive Pitt | Director | 20 May 2010 | 16 Feb 2015 | British | 62 years |
| Martin John Foster | Director | 1 Sept 2003 | 1 Nov 2005 | British | 77 years |
| Martin Stephen Broome | Director | 27 Sept 2001 | 21 Jul 2006 | British | 71 years |
| Martyn Alan Shepherd | Director | 1 Sept 2007 | 4 Jul 2017 | British | 63 years |
| Michael Chippington | Director | 27 Sept 2001 | 13 Sept 2006 | British | 82 years |
| Michael Francis Joseph Mccarry | Director | 2 Sept 2002 | 11 Nov 2005 | British | 71 years |
| Neil Skelding | Director | 1 Oct 2010 | 27 Nov 2012 | British | 55 years |
| Paul Whitmore | Director | 27 Sept 2001 | 31 Dec 2013 | British | 71 years |
| Robert Archibald William Marshall | Director | 28 Jun 1993 | 30 Aug 1994 | British | 94 years |
| Stephen Paul Crummett | Director | 11 Oct 2013 | 7 May 2024 | British | 61 years |
| Susan Jane Cross | Secretary | 13 Oct 1991 | 28 Dec 1994 | British | - |
| William Raymond Johnston | Director | 28 Dec 2000 | 1 Jun 2005 | British | 81 years |
| William Raymond Johnston | Secretary | 28 Dec 1994 | 1 Jun 2005 | British | - |