| Alexander William Rossant Hay | Director | 10 Feb 2009 | 8 Nov 2011 | British | 48 years |
| Anoop Kang | Director | 7 Jan 2016 | 22 Dec 2016 | British | 52 years |
| David Grey Williams | Director | 31 Oct 2007 | 8 Nov 2011 | British | 75 years |
| David Michael Foulds | Director | 5 Jun 2007 | 8 Nov 2011 | British | 66 years |
| David Michael Foulds | Secretary | 5 Jun 2007 | 8 Nov 2011 | British | - |
| David Neville Benson | Director | 8 Jul 2013 | 9 Oct 2015 | British | 56 years |
| Deborah Pamela Hamilton | Secretary | 8 Jul 2013 | 22 Sept 2014 | - | - |
| Donald William Macdiarmid | Director | 6 Sept 2012 | 8 Jul 2013 | British | 65 years |
| Duncan Edward Johnson | Director | 15 Jun 2007 | 10 Feb 2009 | British | 56 years |
| Haydn Jonathan Mursell | Director | 8 Jul 2013 | 16 Apr 2015 | British | 55 years |
| Hugh Edward Earle Raven | Director | 8 Jul 2013 | 16 Apr 2015 | British | 55 years |
| John Douglas Soulby | Director | 15 Jun 2007 | 28 Nov 2008 | British | 74 years |
| Margaret Joan Serna | Director | 15 Jun 2007 | 29 May 2009 | British | 66 years |
| Mark Antony Hazlewood | Director | 13 Mar 2012 | 8 Jul 2013 | British | 60 years |
| Matthew Armitage | Director | 16 Apr 2015 | 16 Jul 2015 | British | 54 years |
| Matthew Armitage | Secretary | 12 Dec 2014 | 16 Jul 2015 | - | - |
| Matthew Stevens | Director | 8 Nov 2011 | 13 Mar 2012 | British | 57 years |
| Michael Leonard Baldwin | Director | 8 Nov 2011 | 30 Sept 2013 | British | 57 years |
| Paul Christopher Roberts | Director | 5 Jun 2007 | 5 Aug 2009 | British | 62 years |
| Paul Spencer Wood | Director | 2 Mar 2009 | 8 Nov 2011 | British | 69 years |
| Philip Windover Fellowes Prynne | Director | 8 Nov 2011 | 6 Sept 2012 | British | 64 years |
| Simon John Howell | Secretary | 8 Nov 2011 | 8 Jul 2013 | - | - |
| Stephen Jago | Director | 15 Jun 2007 | 9 Jan 2008 | British | 71 years |