| Alan William Eatwell | Director | 17 May 1996 | 30 Jun 2001 | British | 73 years |
| Alexander Paul Edwards | Director | 3 Apr 2017 | 30 Aug 2019 | British | 60 years |
| Christian Schreyer | Director | 5 Nov 2021 | 13 Oct 2022 | German | 58 years |
| Christopher Moyes | Director | 19 Oct 1991 | 8 Jul 2006 | British | 77 years |
| Colin Barnes | Director | 2 Jan 2019 | 3 Jan 2023 | British | 51 years |
| David Allen Brown | Director | 1 Apr 2011 | 5 Nov 2021 | British | 66 years |
| David Curry | Director | 1 Aug 2012 | 20 Apr 2018 | British | 56 years |
| David Paul Matthews | Director | 3 Apr 1995 | 16 Oct 2006 | British | 69 years |
| Elodie Marie Francoise Brian | Director | 5 Jun 2019 | 27 Sept 2021 | French | 47 years |
| Erik Martin De Greef | Director | 3 Feb 2020 | 29 Feb 2024 | Dutch | 45 years |
| Gary Edmundson | Director | 6 Feb 2018 | 30 Apr 2024 | British | 59 years |
| George Colin Mcpherson | Director | 7 Sept 1998 | 30 Apr 2017 | British | 67 years |
| Gordon Alexander Boyd | Director | 28 Sept 2021 | 28 Mar 2022 | British | 66 years |
| Ian Geoffrey Banwell | Director | 1 May 1994 | 30 Sept 1996 | British | 80 years |
| Ian Philip Butcher | Director | 1 Apr 1996 | 1 Jul 2007 | British | 75 years |
| Ian Philip Butcher | Secretary | 1 Apr 1996 | 30 Jun 2006 | British | - |
| Julie Elizabeth Diamond | Director | 3 Apr 1995 | 10 Jun 1998 | British | 60 years |
| Keith Down | Director | 7 Mar 2011 | 6 Dec 2015 | British | 61 years |
| Keith Lawrence Ludeman | Director | 10 Jul 2006 | 2 Jul 2011 | British | 76 years |
| Kevin Carr | Director | 26 Jun 1998 | 30 Jun 2018 | British | 68 years |
| Martijn Lee Gilbert | Director | 20 Aug 2018 | 26 Aug 2022 | British | 44 years |
| Martin Philip Harris | Director | 1 Oct 1996 | 31 Mar 2013 | British | 69 years |
| Martin Stanley Andrew Ballinger | Director | 19 Oct 1991 | 31 Dec 2004 | British | 83 years |
| Nicholas Swift | Director | 17 Jul 2007 | 7 Mar 2011 | British | 62 years |
| Peter Frederick Lanfranchi | Director | 1 Jul 1993 | 31 Mar 1996 | British | 87 years |
| Peter George Huntley | Director | 24 Apr 2006 | 31 Dec 2011 | British | 70 years |
| Simon Patrick Butcher | Director | 14 Mar 2016 | 30 Nov 2018 | British | 59 years |
| Simon Paul Carlisle | Director | 4 Jun 2024 | 28 Feb 2025 | British | 58 years |
| Stephen King | Director | 6 Feb 2018 | 2 Dec 2022 | British | 48 years |
| Trevor Halliday Shears | Director | 19 Oct 1991 | 31 Mar 1996 | British | 81 years |
| Trevor Halliday Shears | Secretary | 19 Oct 1991 | 31 Mar 1996 | British | - |