| Alan Douglas Milne | Director | 18 Jul 2003 | 26 Jan 2006 | British | 67 years |
| Alan Robert Turpin | Director | 21 Dec 1991 | 9 Jul 2001 | British | 79 years |
| Alan Robert Turpin | Secretary | 21 Dec 1991 | 9 Jul 2001 | British | - |
| Alan Victor Massey | Director | 6 Feb 1992 | 16 Oct 1995 | British | 73 years |
| Anthony Guthrie | Secretary | 23 Nov 2016 | 3 May 2018 | - | - |
| Bruce Walter Taylor | Director | 21 Dec 1991 | 6 Feb 1992 | British | 92 years |
| Christopher Jonathan Fitzgerald Cassidy | Director | 21 Dec 1991 | 6 Feb 1992 | British | 72 years |
| Claire Louise Catlin | Director | 15 Feb 2019 | 6 Dec 2019 | British | 46 years |
| Colin John Holmes | Director | 9 Jul 2001 | 18 Jul 2003 | British | 70 years |
| Colin John Holmes | Secretary | 18 Jul 2003 | 31 Mar 2007 | British | - |
| Darren Wayne Clark | Director | 6 Dec 2019 | 31 Dec 2020 | British | 47 years |
| David Edward Twigg | Director | 13 Oct 2010 | 3 Jun 2014 | British | 50 years |
| David Greenfield | Director | 6 Feb 1992 | 9 Jul 2001 | British | 80 years |
| David William Adams | Director | 3 Dec 2007 | 2 Aug 2010 | British | 60 years |
| Deborah Pamela Hamilton | Secretary | 11 Sept 2014 | 23 Nov 2016 | - | - |
| Donald Fuller Davis | Director | 2 Aug 2010 | 13 Oct 2011 | American | 58 years |
| Gregor Frank Ball | Director | 29 Mar 2013 | 23 Jul 2015 | British | 63 years |
| Iain Stuart Macmillan | Director | 31 Jan 2017 | 8 Jun 2018 | British | 50 years |
| Ivor Paul Langley | Director | 15 Aug 2006 | 29 Sept 2010 | British | 70 years |
| Julia Foo | Secretary | 14 Jun 2019 | 7 May 2021 | - | - |
| Mark Antony Murphy | Director | 28 Jul 2015 | 1 Oct 2015 | British | 60 years |
| Mark Christopher Hemus | Director | 30 Apr 2015 | 31 Jul 2019 | British | 50 years |
| Martyn Joseph Beauchamp | Director | 1 Oct 2015 | 31 Jan 2017 | British | 54 years |
| Michael Haydn Allen Willis | Secretary | 9 Jul 2001 | 18 Jul 2003 | British | - |
| Michael Haydn Allen Willis | Secretary | 24 Apr 2007 | 12 May 2009 | British | - |
| Michael John Hancox | Director | 9 Jul 2001 | 27 May 2003 | British | 60 years |
| Nicholas John Gresham | Director | 18 Jul 2003 | 30 Nov 2007 | British | 55 years |
| Penelope Ann Mckelvey | Secretary | 28 Jun 2013 | 11 Sept 2014 | - | - |
| Philip Alexander Parker | Secretary | 12 May 2009 | 28 Jun 2013 | British | - |
| Richard William Joyce | Director | 16 Oct 1995 | 9 Jul 2001 | British | 71 years |
| Ryan James Mynard | Director | 8 Jun 2018 | 15 Feb 2019 | British | 46 years |
| Sally Jane Veitch | Director | 13 Oct 2011 | 29 Mar 2013 | British | 53 years |
| Sally Jane Veitch | Director | 16 Apr 2014 | 30 Apr 2015 | British | 53 years |
| Stephen Leonard Robinson | Director | 29 May 2003 | 18 Jul 2003 | British | 56 years |
| Timothy Fallowfield | Secretary | 3 May 2018 | 14 Jun 2019 | - | - |