| Andrew Martin Pollins | Director | 1 Jul 2020 | 12 Nov 2021 | British | 59 years |
| Andrew Stephen James Ramsay | Director | 11 Mar 2003 | 19 Mar 2003 | British | 65 years |
| Andrew Stephen James Ramsay | Director | 4 Sept 2003 | 3 Feb 2011 | British | 65 years |
| Andrew Stephen James Ramsay | Secretary | 19 Mar 2003 | 3 Feb 2011 | British | - |
| David George Alcock | Director | 1 Oct 2018 | 31 Jan 2022 | British | 61 years |
| David Whipple Crane | Director | 19 Mar 2003 | 30 Nov 2003 | American | 67 years |
| Geert Herman August Peeters | Director | 15 May 2012 | 30 May 2013 | Belgian | 63 years |
| Hendrik De Buyserie | Director | 9 Jul 2013 | 31 Mar 2017 | Belgian | 56 years |
| Iain Malcolm Irvine | Director | 11 Mar 2003 | 19 Mar 2003 | British | 63 years |
| Iain Malcolm Irvine | Secretary | 11 Mar 2003 | 19 Mar 2003 | British | - |
| Jaideep Singh Sandhu | Director | 31 Mar 2017 | 30 Sept 2018 | Indian | 60 years |
| Kennith John Oakley | Director | 5 Jun 2003 | 21 Dec 2007 | British | 64 years |
| Mark David Williamson | Director | 6 Dec 2004 | 15 May 2012 | British | 69 years |
| Penelope Louise Small | Director | 4 Sept 2003 | 31 Mar 2017 | British | 60 years |
| Peter George Barlow | Director | 19 Mar 2003 | 24 Jun 2009 | British | 73 years |
| Philip Gotsall Cox | Director | 19 Mar 2003 | 6 Dec 2004 | British | 75 years |
| Pierre Jean Bernard Guiollot | Director | 30 May 2013 | 31 Mar 2017 | French | 58 years |
| Roger Derek Simpson | Secretary | 3 Feb 2011 | 31 May 2017 | British | - |
| Sarah Frances Fleure Mingham | Director | 31 Mar 2017 | 10 May 2019 | British | 49 years |
| Sarah Jane Gregory | Director | 7 Jun 2019 | 31 Aug 2019 | British | 61 years |
| Sarah Jane Gregory | Secretary | 1 Jun 2017 | 23 Jul 2021 | - | - |
| Simon David Pinnell | Director | 31 Mar 2017 | 31 Jul 2020 | British | 62 years |