| Allan Charles Edwin Cockell | Director | 18 Jan 2008 | 26 Apr 2011 | British | 65 years |
| Caroline Margaret Ashby | Secretary | 15 Sept 2004 | 29 Mar 2005 | British | - |
| Celine Arlette Virginie Barroche | Director | 24 May 2017 | 31 Jul 2024 | French | 52 years |
| Charles Latham Baillieu | Director | 12 May 2021 | 30 Sept 2024 | British | 41 years |
| David Byrne | Director | 4 Dec 2013 | 24 May 2017 | British | 60 years |
| David Mark Bardsley Parry | Director | 29 Mar 2005 | 23 Jul 2008 | English | 62 years |
| David Mel Zuydam | Director | 28 Feb 2014 | 16 May 2014 | British | 65 years |
| Gareth Nigel Christopher Roberts | Director | 24 May 2017 | 4 Dec 2024 | British | 64 years |
| Ian Karl Buehring | Director | 29 Mar 2005 | 26 Apr 2011 | British | 73 years |
| John Ian Potter | Director | 29 Mar 2005 | 10 Nov 2011 | British | 63 years |
| John Michael Brady | Director | 29 Mar 2005 | 26 Apr 2011 | British | 81 years |
| Jonathan Masson Payne | Director | 10 Jun 2015 | 24 May 2017 | British | 63 years |
| Julian Mark Hartley | Director | 16 May 2014 | 24 May 2017 | British | 65 years |
| Kevin James Boyd | Director | 1 Jul 2009 | 26 Apr 2011 | British | 62 years |
| Malcolm Thomas Hallsworth Roberts | Director | 29 Mar 2005 | 26 Apr 2011 | British | 77 years |
| Mark Derrick Ranulph Rowan | Director | 29 Mar 2005 | 18 Jan 2008 | British | 68 years |
| Nathan Richards | Director | 26 Apr 2011 | 28 Feb 2014 | British | 57 years |
| Peter Neden | Director | 28 Feb 2014 | 10 Jun 2015 | British | 58 years |
| Richard Morris | Director | 26 Apr 2011 | 23 Oct 2013 | British | 51 years |
| Richard Morris | Director | 26 Apr 2011 | 3 May 2011 | British | 57 years |
| Robert Erling Ashby | Director | 15 Sept 2004 | 26 Apr 2011 | British | 79 years |
| Robert Erling Ashby | Secretary | 29 Mar 2005 | 26 Apr 2011 | British | - |
| Russell William James Miles | Director | 29 Mar 2005 | 26 Apr 2011 | English | 61 years |
| Soren Lundsberg-nielsen | Director | 24 May 2017 | 24 Nov 2021 | Danish | 75 years |
| Timothy Peter Weller | Director | 24 May 2017 | 11 May 2021 | British | 63 years |
| Vaishali Jagdish Patel | Secretary | 26 Apr 2011 | 24 May 2017 | - | - |
| Vaishali Jagdish Patel | Secretary | 22 Jan 2018 | 5 May 2021 | - | - |
| William Andrew Hayes | Secretary | 24 May 2017 | 22 Jan 2018 | - | - |