| Alan Christopher Wilson | Director | 24 Jul 2013 | 31 Jul 2016 | British | 68 years |
| Alan Stanley Thompson | Director | 12 Jul 1991 | 1 Oct 1991 | British | 82 years |
| Anthony Jonathan Reizenstein | Director | 27 Oct 2009 | 7 Dec 2010 | British | 70 years |
| Ashley John William Lillie | Director | 18 Aug 2016 | 30 Jun 2019 | British | 56 years |
| Brona Rose Mckeown | Secretary | 19 Dec 2014 | 30 Mar 2015 | - | - |
| Caroline Jane Richardson | Director | 9 May 2017 | 22 Oct 2018 | British | 52 years |
| Clare Louise Gosling | Director | 18 Jul 2013 | 20 Aug 2015 | British | 53 years |
| Daniel Mundy | Director | 18 Aug 2016 | 15 Mar 2017 | British | 50 years |
| David Clive Whitehead | Secretary | 30 Mar 2015 | 14 Feb 2019 | - | - |
| David James Mccarthy | Director | 26 Nov 2008 | 27 Oct 2009 | British | 61 years |
| David Michael Miller | Director | 6 Nov 2018 | 1 Feb 2019 | British | 41 years |
| David Tweedy | Director | 20 Dec 2005 | 27 Oct 2009 | British | 68 years |
| Francis Michael Shaw | Director | 1 Oct 1991 | 15 Sept 1994 | British | 90 years |
| Gerald Arthur Gregory | Director | 5 Jul 1995 | 31 Mar 2008 | British | 71 years |
| Ian Curtis Gayward | Director | 28 Dec 2012 | 11 Oct 2013 | British | 73 years |
| John Laidlaw Rowan | Director | 19 Nov 2009 | 22 Oct 2010 | British | 60 years |
| John Richard Hughes | Director | 18 Jul 2013 | 11 Nov 2013 | British | 64 years |
| Jon Ian Katovsky | Director | 3 Jan 2006 | 19 Mar 2010 | American | 68 years |
| Katy Jane Arnold | Secretary | 22 Oct 2014 | 19 Dec 2014 | - | - |
| Keith Brian Alderson | Director | 27 Oct 2009 | 4 Jun 2013 | British | 66 years |
| Kevin Michael Blake | Director | 27 Oct 2009 | 9 Nov 2012 | British | 68 years |
| Louis Neville Clarke Mullinger | Director | 12 Jul 1991 | 1 Oct 1991 | British | 77 years |
| Louis Neville Clarke Mullinger | Secretary | 12 Jul 1991 | 1 Oct 1991 | British | - |
| Louise Jeanette Britnell | Director | 19 Sept 2019 | 31 Mar 2025 | British | 47 years |
| Michael George Lewis | Director | 21 Oct 2005 | 27 Oct 2009 | British | 74 years |
| Nicholas Stuart Slape | Director | 25 Feb 2019 | 22 Jul 2022 | British | 63 years |
| Patricia Anne Wade | Secretary | 6 Dec 2009 | 19 Jul 2010 | - | - |
| Paul Andrew Mills | Director | 15 Sept 1994 | 1 Jun 1995 | British | 69 years |
| Paul Antony Wilson | Director | 20 Jan 2011 | 24 Jul 2013 | British | 55 years |
| Paul Derek Medford | Secretary | 1 Aug 2007 | 6 Dec 2009 | British | - |
| Peter John Green | Director | 27 Sept 1996 | 16 May 2001 | British | 70 years |
| Philip Michael Garlick | Director | 19 Jan 2011 | 27 Apr 2013 | British | 65 years |
| Phillip Andrew Lee | Director | 30 Oct 2003 | 27 Oct 2009 | British | 71 years |
| Richard David Altham | Director | 9 Dec 2009 | 10 Nov 2010 | British | 56 years |
| Robin Sinclair Green | Director | 1 Oct 1991 | 31 Jul 2007 | British | 80 years |
| Robin Sinclair Green | Secretary | 1 Oct 1991 | 31 Jul 2007 | British | - |
| Stephen Aitken | Director | 30 Oct 2014 | 6 Jan 2017 | British,australian | 49 years |
| Stephen Williams | Director | 1 Jun 1995 | 27 Oct 2009 | British | 76 years |
| Susan Moss | Secretary | 19 Jul 2010 | 21 Oct 2014 | - | - |
| Trevor John Bayley | Director | 5 Jul 1995 | 21 Nov 2000 | British | 75 years |
| William Edward Newby | Director | 27 Oct 2009 | 21 Jun 2013 | British | 67 years |