| Andrew Michael Knight | Director | 4 Dec 2008 | 13 May 2011 | British | 63 years |
| Anne Elizabeth Bassis | Director | 13 May 2011 | 18 Jan 2012 | American/british | 55 years |
| Anthony William Phillp | Director | 12 Oct 1991 | 31 Mar 2009 | British | 79 years |
| Gab Saturnio Barbaro | Director | 18 Jan 2012 | 10 Oct 2016 | Italian | 55 years |
| Gearoid Martin Lane | Director | 13 May 2011 | 30 Oct 2012 | Irish | 62 years |
| Ivan Edward Ronald | Director | 24 Jan 2018 | 5 Jul 2019 | British | 54 years |
| John Stanley Bryant | Director | 12 Oct 1991 | 13 Nov 2007 | British | 78 years |
| John Stanley Bryant | Secretary | 12 Oct 1991 | 13 Nov 2007 | British | - |
| Justine Michelle Campbell | Director | 10 Oct 2016 | 27 Apr 2017 | British | 56 years |
| Kenneth Michael Anidjar Main | Director | 9 Feb 2012 | 20 Jul 2016 | British | 51 years |
| Marianne Elliott | Director | 31 Mar 1993 | 28 Mar 2008 | British | 79 years |
| Mark Steven Hodges | Director | 10 Oct 2016 | 28 Feb 2019 | British | 61 years |
| Martin Philip Jones | Director | 28 Mar 2008 | 13 May 2011 | British | 59 years |
| Maureen Phillp | Director | 31 Mar 1993 | 28 Mar 2008 | British | 79 years |
| Michael David Kirwan | Director | 1 Apr 2019 | 31 Aug 2020 | Irish | 55 years |
| Nevin John Truesdale | Director | 13 May 2011 | 9 Feb 2012 | British | 52 years |
| Peter Charles Gambrell | Director | 12 Oct 1991 | 13 May 2011 | British | 78 years |
| Rajarshi Roy | Director | 27 Apr 2017 | 30 Jun 2022 | British | 51 years |
| Sarah Elizabeth Mussenden | Director | 1 Jul 2019 | 30 Jun 2021 | British | 61 years |
| Simon Robert Hindley | Director | 28 Mar 2008 | 13 May 2011 | British | 54 years |
| Simon Robert Hindley | Secretary | 28 Mar 2008 | 13 May 2011 | British | - |
| Steven John Buck | Director | 20 Jul 2016 | 24 Jan 2018 | British | 57 years |