| Alan John Fielder | Director | 20 Jun 2006 | 30 Nov 2016 | British | 78 years |
| Charles Peter Judge | Secretary | 20 Jun 2006 | 6 Apr 2008 | British | - |
| David Robert Macgowan Chapman | Director | 20 Jun 2006 | 30 Sept 2009 | British | 85 years |
| Geoffrey Mark Hodgson | Director | 30 Sept 2011 | 30 Nov 2018 | British | 65 years |
| Graham Simon Thrower | Director | 1 Dec 2016 | 31 May 2017 | British | 60 years |
| Hugh Richard Vaughan Morgan Williams | Director | 20 Jun 2006 | 30 Sept 2009 | British | 73 years |
| John Irving Josephs | Director | 20 Jun 2006 | 30 Sept 2011 | British | 82 years |
| Kathryn Lucy Hay Winskell | Director | 20 Jun 2006 | 30 Sept 2011 | British | 63 years |
| Kathryn Lucy Hay Winskell | Director | 1 Aug 2012 | 30 Nov 2016 | British | 63 years |
| Michael Alan Smith | Director | 20 Jun 2006 | 30 Sept 2011 | British | 68 years |
| Stephen John Lightley | Director | 26 Nov 2015 | 30 Mar 2022 | British | 69 years |
| Thomas Irvine | Director | 20 Jun 2006 | 28 Mar 2007 | British | 83 years |