| Andrew Christopher Wordsworth | Director | 7 Mar 2008 | 23 Feb 2011 | British | 56 years |
| Anthony Howard Stockwell | Secretary | 7 Mar 2008 | 30 Jun 2010 | - | - |
| Claire Anne Williams | Secretary | 30 Jun 2010 | 26 Sept 2014 | - | - |
| James Edward Hall-smith | Director | 17 Mar 2008 | 21 Feb 2017 | British | 57 years |
| Rosemary Jane Cecilia Boot | Director | 7 Mar 2008 | 16 Sept 2008 | British | 64 years |
| Stanislav Michael Kolenc | Director | 19 Nov 2010 | 28 Oct 2015 | Canadian | 49 years |
| Stephen David Ainger | Director | 7 Mar 2008 | 29 Jan 2016 | British | 75 years |
| Thibault Francois Paul Richon | Director | 28 Oct 2015 | 29 Jan 2016 | French | 44 years |