| Alexander Rudolf Dieter Koslowski | Director | 12 Jun 2018 | 21 Dec 2019 | German | 55 years |
| Andrea Gertrude Martha Montague | Director | 19 Jul 2018 | 17 Mar 2020 | British | 51 years |
| Andrew Stewart Carter | Director | 3 Apr 2002 | 28 Jun 2021 | British | 66 years |
| Andrew William Palmer | Director | 18 Oct 2016 | 3 Apr 2020 | British | 73 years |
| Ann O'brien | Director | 24 Jul 2020 | 23 Jul 2023 | British,irish | 62 years |
| Bernadette Clare Barber | Secretary | 2 Apr 2002 | 3 Jun 2005 | British | - |
| Catherine Rebecca Read | Director | 11 Jan 2018 | 30 Sept 2021 | British | 46 years |
| Christopher Martin Phillips | Director | 17 Apr 2000 | 19 Sept 2003 | British | 70 years |
| Christopher Morson | Director | 24 Jul 2020 | 23 Jul 2025 | British | 69 years |
| Cyril Brill | Director | 4 Apr 1991 | 31 Jan 1993 | British | 93 years |
| David Callum Hughson | Director | 3 Apr 2002 | 31 Dec 2004 | British | 67 years |
| Gareth Richard Stewart Dickinson | Director | 17 Aug 2009 | 31 Dec 2013 | British | 56 years |
| Graham George Ellis | Director | 4 Apr 1991 | 28 Apr 2000 | British | 69 years |
| Howard Andrew Carle Daldorph | Director | 4 Apr 1991 | 1 Jun 2001 | British | 78 years |
| Jane Heather Coffey | Director | 1 Jan 2005 | 19 Feb 2013 | British | 63 years |
| John Robert Tovey | Director | 1 Jan 1996 | 3 Apr 2002 | British | 78 years |
| Jonathan Mark Macdonald | Director | 10 Jul 2014 | 5 Mar 2015 | British | 54 years |
| Jonathan Platt | Director | 22 Sept 2003 | 11 Apr 2017 | British | 64 years |
| Julia Helen Martin | Director | 1 Jan 2005 | 10 Aug 2007 | British | 64 years |
| Kevin Allen Huw Parry | Director | 4 Apr 2020 | 24 Jun 2021 | British | 64 years |
| Mark Christopher Beesley | Director | 4 Apr 1991 | 30 Jun 1999 | British | 81 years |
| Michael John Yardley | Director | 4 Apr 1991 | 14 May 2010 | British | 70 years |
| Murray John Ross | Secretary | 1 Apr 1996 | 2 Apr 2002 | British | - |
| Paul Dieter Schmidt | Director | 2 Dec 2003 | 23 Jan 2006 | British | 57 years |
| Paul Doran | Director | 25 Aug 2005 | 16 May 2008 | British | 67 years |
| Piers Adrian Carlyle Hillier | Director | 26 Mar 2015 | 5 Sept 2025 | British | 58 years |
| Richard James | Director | 3 Apr 2002 | 31 Dec 2017 | British | 62 years |
| Robert Arthur Daniel Williams | Director | 10 Jul 2013 | 26 Apr 2024 | British | 55 years |
| Robert Edwin Talbut | Director | 22 Nov 2004 | 31 Dec 2014 | British | 66 years |
| Robert George Alexander Swan | Director | 1 Feb 1993 | 3 Aug 2000 | British | 79 years |
| Rodney Keith Pollard | Director | 4 Apr 1991 | 31 Dec 1998 | British | 86 years |
| Seamus Martin Anthony Hughes | Director | 3 Feb 2000 | 31 Aug 2002 | Irish | 61 years |
| Shirley Jill Garrood | Director | 16 Feb 2021 | 6 Jun 2023 | British | 69 years |
| Steven Grant Murray | Director | 30 Apr 2020 | 29 Jun 2021 | British | 48 years |
| Sven Dean Farmer | Secretary | 4 Apr 1991 | 31 Mar 1996 | British | - |
| Timothy Walter Harris | Director | 9 Jul 2015 | 14 Jun 2018 | British | 57 years |
| Victoria Anne Muir | Director | 17 Aug 2009 | 28 Feb 2014 | British | 55 years |