| Andrew Paul Burton | Director | 20 Sept 2006 | 5 Nov 2015 | British | 57 years |
| Angus Roch Bujalski | Secretary | 19 Dec 2016 | 15 Apr 2020 | - | - |
| Angus Roch Bujalski | Secretary | 23 Sept 2021 | 10 Jan 2022 | - | - |
| Christopher Richard Skaife | Secretary | 10 Jan 2022 | 4 Nov 2024 | - | - |
| Fiona Downes | Secretary | 15 Apr 2020 | 23 Sept 2021 | - | - |
| Francis Stephen Kurt Baron | Director | 25 Nov 2005 | 4 Jul 2010 | British | 80 years |
| Howard Thomas | Secretary | 25 Nov 2005 | 25 Nov 2005 | British | - |
| Ian Raymond Edwards | Director | 20 Sept 2006 | 4 May 2022 | British | 65 years |
| Ian Russell Ritchie | Director | 27 Feb 2012 | 24 Apr 2013 | British | 73 years |
| James Coulson | Director | 21 May 2014 | 1 Aug 2017 | British | 81 years |
| John David Steele | Director | 6 Sept 2010 | 10 Jun 2011 | British | 62 years |
| John Nicholas Vale | Director | 26 Mar 2008 | 8 Jul 2012 | British | 75 years |
| Karena Gaye Vleck | Secretary | 25 Nov 2005 | 2 Sept 2016 | British | - |
| Mark Anthony Lynch | Director | 17 Dec 2021 | 1 Aug 2024 | British | 49 years |
| Michael Alan Burton | Director | 20 Sept 2006 | 10 Dec 2013 | British | 81 years |
| Nicholas John Eastwood | Director | 25 Nov 2005 | 10 Jun 2011 | British | 67 years |
| Paul Julian Vaughan | Director | 25 Nov 2005 | 27 Feb 2012 | British | 71 years |
| Peter Derek Whiting | Director | 1 Aug 2017 | 31 Jul 2022 | British | 56 years |
| Richard William Daniel | Director | 24 Apr 2013 | 27 Aug 2018 | British | 60 years |
| Sarah Kate Williams | Director | 15 Apr 2020 | 7 Apr 2025 | British | 54 years |
| Simon Edwin Massie-taylor | Director | 6 Oct 2016 | 17 Dec 2021 | British | 46 years |
| Sophie Goldschmidt | Director | 18 Jul 2011 | 29 Jan 2016 | British | 52 years |
| Stephen Paul Brown | Director | 10 Jun 2011 | 24 Apr 2013 | British | 61 years |
| Susan Margaret Day | Director | 27 Aug 2018 | 15 Apr 2020 | British | 54 years |
| William Tester | Director | 25 Nov 2005 | 25 Nov 2005 | British | 64 years |
