| Anne Elizabeth Bassis | Director | 13 May 2011 | 18 Jan 2012 | American/british | 55 years |
| Brenda Mary Jones | Director | 6 Oct 1991 | 13 May 2011 | British | 83 years |
| Brenda Mary Jones | Secretary | 6 Oct 1991 | 13 May 2011 | British | - |
| Christopher Simon Jones | Director | 1 Aug 2000 | 13 May 2011 | British | 55 years |
| David James Burke | Director | 1 Dec 2008 | 13 May 2011 | British | 53 years |
| Derek Corbishley | Director | 31 Mar 2006 | 13 May 2011 | British | 53 years |
| Donald William Hankey | Director | 6 Oct 1991 | 13 May 2011 | British | 74 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 |
| Jana Siber | Director | 1 Dec 2022 | 28 Feb 2025 | British | 54 years |
| 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 |
| Mark Steven Hodges | Director | 10 Oct 2016 | 28 Feb 2019 | British | 61 years |
| Martin Philip Jones | Director | 1 Aug 2000 | 13 May 2011 | British | 59 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 |
| Paul Richard Nelson | Director | 1 Aug 2000 | 13 May 2011 | British | 58 years |
| Peter Vernon Black | Director | 1 Mar 2014 | 10 Oct 2016 | British | 66 years |
| Phillip Henry Jones | Director | 6 Oct 1991 | 13 May 2011 | British | 87 years |
| Rajarshi Roy | Director | 27 Apr 2017 | 17 Dec 2023 | British | 51 years |
| Sarah Elizabeth Mussenden | Director | 1 Jul 2019 | 30 Jun 2021 | British | 61 years |
| Simon Robert Hindley | Director | 1 Jan 2007 | 13 May 2011 | British | 54 years |
| Steven John Buck | Director | 20 Jul 2016 | 24 Jan 2018 | British | 57 years |
| Stuart David Phillips | Director | 30 Jun 2021 | 1 Dec 2022 | British | 49 years |
| Wayne Stowell | Director | 31 Mar 2006 | 16 May 2008 | British | 55 years |