| Alan Robert Young | Director | 19 Mar 1992 | 31 Jul 1995 | British | 88 years |
| Alasdair Christopher Gillies | Director | 6 Apr 2005 | 30 Jun 2008 | British | 68 years |
| Amanda Louise Knott | Secretary | 21 Aug 2007 | 25 Jul 2013 | British | - |
| Ann Claire Blundell | Secretary | 25 Jul 2013 | 9 Apr 2014 | - | - |
| Brian Michael Thomas | Director | 6 Dec 1995 | 3 Aug 1998 | British | 74 years |
| Corina Katherine Ross | Secretary | 30 Mar 2011 | 25 Jul 2013 | British | - |
| David Capel | Director | 24 Sept 1997 | 29 Apr 2004 | British | 73 years |
| David William Ford | Director | 18 Nov 2014 | 9 Jun 2016 | British | 62 years |
| Gareth David Jenkins | Director | 20 Jun 2016 | 31 Jul 2018 | British | 50 years |
| Helen Frances Leigh Rogers | Secretary | 14 Jul 2008 | 2 Dec 2011 | British | - |
| Ian Ritchie | Secretary | 25 Jul 2013 | 9 Apr 2014 | - | - |
| Isla Rebecca Hale | Secretary | 30 Sept 2004 | 30 Jun 2006 | British | - |
| Jayne Michelle Meacham | Secretary | 21 Aug 2007 | 2 May 2008 | British | - |
| Jeremy Ward Grayburn | Director | 10 Dec 1991 | 3 Dec 1996 | British | 74 years |
| Jonathan Vaughan-williams | Director | 1 Apr 2016 | 28 Apr 2017 | British | 59 years |
| Ladislav Vaclav Suchopar | Director | 19 Mar 1991 | 30 Jun 1991 | British | 83 years |
| Martin David Moule | Director | 6 Dec 1995 | 24 Sept 1997 | British | 71 years |
| Neil James Evans | Director | 30 Jun 2008 | 31 Mar 2016 | British | 69 years |
| Nigel Lowe | Secretary | 30 Jun 2006 | 21 Aug 2007 | British | - |
| Norman Robert Leslie | Director | 19 Mar 1992 | 13 Jan 1993 | British | 82 years |
| Peter Charles Howe | Secretary | 19 Mar 1991 | 30 Sept 2004 | British | - |
| Phil Andrew Hodkinson | Director | 20 Dec 1996 | 22 Nov 2000 | British | 68 years |
| Philip Smith | Director | 19 Mar 1991 | 6 Dec 1995 | British | 79 years |
| Shayne Paul Deighton | Director | 3 Aug 1998 | 19 Dec 2000 | British | 67 years |
| Simon William Foster | Director | 29 Apr 2004 | 20 Jun 2016 | British | 57 years |
| Steven James Colsell | Director | 19 Dec 2000 | 30 Sept 2004 | British | 62 years |