| Ana Maria Silvia Sagra-smith | Director | 22 Mar 2007 | 18 Oct 2007 | British | 55 years |
| Christopher David Tickle | Director | 1 Oct 2010 | 24 Mar 2017 | British | 47 years |
| Christopher David Tickle | Director | 17 May 2023 | 31 Jul 2024 | English | 47 years |
| Clym Brown | Director | 22 Mar 2007 | 31 Jul 2022 | British | 49 years |
| David John Murray | Director | 3 Jun 1993 | 25 Jul 2000 | British | 55 years |
| David John Murray | Secretary | 27 Feb 1991 | 25 Jul 2000 | British | - |
| Denis Gerard Cummins | Director | 1 Jun 2007 | 29 Oct 2015 | British | 71 years |
| Denis Gerard Cummins | Secretary | 1 Jun 2007 | 29 Oct 2015 | British | - |
| Ian John Kane | Director | 1 Oct 2020 | 3 Dec 2021 | British | 69 years |
| James Daniel Ashton | Director | 30 Oct 2014 | 10 Jul 2019 | British | 53 years |
| James Ernest Ludwig | Director | 25 Mar 2007 | 7 Jul 2023 | American | 52 years |
| James Lee Kinnear | Director | 27 Feb 1991 | 27 Aug 1993 | British | 63 years |
| James Michael Garrity | Secretary | 25 Jul 2000 | 1 Aug 2006 | British | - |
| Jonathan Charles Laurence Foxcroft | Director | 1 Aug 2006 | 29 Jun 2007 | British | 62 years |
| Jonathan Charles Laurence Foxcroft | Secretary | 1 Aug 2006 | 29 Jun 2007 | British | - |
| Jonathan David Green | Director | 22 Mar 2007 | 31 Dec 2007 | British | 51 years |
| Jonathan Tan | Director | 14 Oct 2019 | 4 Apr 2023 | British | 45 years |
| Jonathan Tan | Secretary | 14 Oct 2019 | 4 Apr 2023 | - | - |
| Mark David Garner | Director | 3 Jun 1993 | 8 Nov 1999 | British | 60 years |
| Mark Douglas | Director | 18 Sept 2017 | 3 Jun 2022 | British | 64 years |
| Mark Gregory Pitts | Director | 22 Mar 2007 | 17 Dec 2007 | British | 54 years |
| Michael Stembridge | Director | 4 Sept 2017 | 16 Mar 2020 | British | 56 years |
| Ming Zhang | Director | 6 Jul 2016 | 14 Feb 2018 | Canadian | 59 years |
| Neil Anthony Quinn | Director | 8 Nov 2005 | 23 Jan 2009 | British | 75 years |
| Nigel James Benedict Trodd | Director | 23 Jan 2009 | 12 Apr 2012 | British | 67 years |
| Nigel James Benedict Trodd | Director | 25 Apr 2014 | 6 Jul 2016 | British | 67 years |
| Peter Anton Alexander | Director | 1 Apr 2020 | 27 Jun 2023 | British | 42 years |
| Peter Glyn Harries | Director | 5 Nov 2007 | 30 Jun 2016 | British | 70 years |
| Philippe Paul Felten | Director | 12 Apr 2012 | 25 Apr 2014 | Belgian | 60 years |
| Richard Anthony Paul Joynson | Director | 29 Oct 2015 | 14 Oct 2019 | British | 58 years |
| Richard Anthony Paul Joynson | Secretary | 29 Oct 2015 | 14 Oct 2019 | - | - |
| Robert James Austen | Director | 27 Feb 1991 | 31 Dec 2007 | British | 72 years |
| Russell Paul Trotter | Director | 1 Nov 2007 | 17 Apr 2014 | British | 60 years |
| Stephen John Skinner | Director | 8 Nov 2005 | 29 Jun 2007 | British | 68 years |
| Steven Malcolm Brown | Director | 14 Feb 2018 | 1 Apr 2021 | British | 59 years |
| Tim Prestidge | Director | 1 Apr 2021 | 6 Aug 2021 | British | 54 years |