| Caroline Elizabeth Gilpin | Director | 14 Nov 2018 | 6 May 2024 | British | 49 years |
| Christopher David Sweatman | Director | 12 Dec 2005 | 16 Jul 2008 | - | 51 years |
| Dominic Paul Keating | Director | 28 Nov 2003 | 12 Dec 2005 | British | 58 years |
| Elena Giorgiana Wegener | Director | 28 Jan 2021 | 5 Dec 2021 | British | 51 years |
| Gordon Alan Macdougall | Director | 25 Jun 2009 | 30 Nov 2015 | British | 56 years |
| John Walter Irvine | Director | 3 Feb 2000 | 4 Feb 2000 | British | 60 years |
| Julia Katharine Rhodes | Director | 16 Jul 2008 | 26 Mar 2010 | British | 55 years |
| Michael John Harper | Director | 14 Feb 2000 | 10 Mar 2005 | British | 63 years |
| Michael Robert O'neill | Director | 14 Feb 2000 | 28 Nov 2003 | British | 58 years |
| Michael Robert O'neill | Director | 10 Mar 2005 | 22 Jan 2008 | British | 58 years |
| Mitesh Raj Patel | Director | 22 Nov 2018 | 10 Jan 2022 | British | 44 years |
| Paul Mcbride | Director | 3 Feb 2000 | 14 Feb 2000 | Irish | 60 years |
| Paul Walker | Director | 16 Jul 2008 | 23 Nov 2010 | British | 54 years |
| Peter Moore Quilleash | Director | 14 Feb 2000 | 31 Oct 2003 | British | 74 years |
| Richard Paul Russell | Director | 30 Nov 2015 | 14 Nov 2018 | British | 45 years |
| Robert Ian Harvey | Director | 14 Feb 2000 | 10 Mar 2005 | British | 73 years |
| Robert Ian Harvey | Secretary | 3 Feb 2000 | 10 Mar 2005 | British | - |
| Ross Frazer Finlay | Director | 23 Nov 2010 | 30 Aug 2013 | British | 55 years |
| Russell Alan Farnhill | Director | 30 Aug 2013 | 10 Jun 2016 | British | 51 years |
| Stacey Rhian-michelle Jackson | Director | 2 Dec 2019 | 6 May 2024 | British | 39 years |
| Stephen John Tivadar Balint | Director | 28 Nov 2003 | 25 Jun 2009 | British | 72 years |
| Steven William Hughes | Director | 26 Mar 2010 | 28 Nov 2019 | British | 54 years |
| William Douglas Wright | Director | 22 Jan 2008 | 25 Jun 2009 | British | 66 years |