| Allan Leslie Leighton | Director | 19 Sept 2012 | 25 Feb 2015 | British | 72 years |
| Amanda Jane Watkins | Director | 1 May 2005 | 30 Apr 2007 | British | 54 years |
| Amanda Jane Watkins | Secretary | 1 Apr 2005 | 30 Apr 2007 | British | - |
| Andrea Jayne Thompson | Director | 14 Apr 2016 | 22 Dec 2016 | British,american | 56 years |
| Boris Robert Paul Pucelle | Director | 27 Nov 2008 | 26 Mar 2014 | French | 50 years |
| Charles Richard Petty Bigham | Secretary | 30 Apr 2007 | 1 Mar 2008 | British | - |
| Claire Joanna Worthington | Director | 6 Aug 1998 | 3 Aug 1999 | British | 57 years |
| Claire Joanna Worthington | Secretary | 22 Aug 1996 | 1 Apr 2005 | British | - |
| Guy Mclaren | Director | 1 May 2005 | 18 Jul 2012 | British | 49 years |
| Haseen Mohamed Naheem | Director | 1 Jul 2010 | 30 Sept 2020 | British | 58 years |
| Haseen Mohamed Naheem | Secretary | 1 Jul 2010 | 30 Sept 2020 | - | - |
| Howard Paul Nelson | Director | 1 Mar 2008 | 24 Jun 2010 | British | 58 years |
| Howard Paul Nelson | Secretary | 1 Mar 2008 | 24 Jun 2010 | British | - |
| James Edward Conway Bigham | Director | 3 Aug 1999 | 31 Jul 2005 | British | 52 years |
| Joyce Treasure | Secretary | 2 Aug 1996 | 5 Aug 1996 | British | - |
| Mark Down | Director | 6 Aug 1998 | 15 Sept 2002 | British | 59 years |
| Paul Daniel Whyte | Director | 13 Nov 2014 | 29 May 2015 | Britsh | 48 years |
| Rachel Clare Kelley Challifour | Director | 5 Nov 2012 | 1 Jan 2013 | British | 54 years |
| Rachel Kelley | Director | 12 Sept 2013 | 17 May 2017 | British | 54 years |
| Richard Geoffrey Worrall | Director | 20 Oct 2005 | 12 Sept 2008 | British | 65 years |
| Thomas David Allchurch | Director | 4 Jan 2010 | 22 Dec 2016 | British | 63 years |
