| Alan Malcolm Chater | Director | 1 Apr 2003 | 31 Mar 2010 | British | 75 years |
| Andrew Bernard Pitcher | Director | 26 Jan 2000 | 28 Feb 2003 | British | 79 years |
| Andrew John Cornish | Director | 14 Oct 2010 | 5 Aug 2011 | British | 60 years |
| Annabel Louise Pearce | Director | 20 Jun 2013 | 6 Oct 2016 | British | 51 years |
| Anthony John Keeler | Director | 4 Nov 2002 | 9 Jul 2010 | British | 82 years |
| Clive Campbell Holmes | Director | 25 Jul 2002 | 21 May 2015 | British | 76 years |
| Clive Campbell Holmes | Secretary | 25 Jul 2002 | 21 May 2015 | British | - |
| Dean Trevor Smith | Director | 5 Jan 2017 | 11 Oct 2018 | British | 58 years |
| Eamonn Feeney | Director | 31 May 2011 | 30 Sept 2015 | British | 71 years |
| Gwynneth Page | Director | 11 May 2022 | 26 Jul 2023 | British | 52 years |
| Johann Lesley Robinson | Director | 10 Nov 2015 | 19 Jan 2018 | British | 65 years |
| John George Watson | Director | 15 Mar 2001 | 30 Jun 2003 | British | 68 years |
| John Michael Dean | Director | 25 Jul 1991 | 17 Nov 1992 | British | 87 years |
| John Richard Hamblett | Director | 28 May 1993 | 26 Jan 2000 | British | 96 years |
| Matthew Jason Leonard-williams | Director | 22 Nov 2011 | 4 Nov 2015 | British | 58 years |
| Michael James Glanville | Director | 14 Dec 2018 | 9 May 2025 | British | 48 years |
| Michael John Tufnell | Director | 25 Jul 1991 | 30 Jun 2000 | British | 83 years |
| Michael John Tufnell | Secretary | 25 Jul 1991 | 30 Jun 2000 | British | - |
| Philip Mason | Director | 25 Jul 1991 | 28 May 1993 | British | 76 years |
| Richard Anthony Broadribb | Director | 9 Nov 2017 | 31 Dec 2023 | British | 56 years |
| Richard John Amesbury-page | Director | 12 Sept 2023 | 31 Aug 2025 | British | 56 years |
| Richard John Reddyhoff | Director | 25 Jul 1991 | 31 May 1992 | British | 74 years |
| Robert Daniel George Grant | Director | 5 Jan 2017 | 30 Nov 2018 | British | 49 years |
| Robert Ian Horsford | Director | 26 Jan 2000 | 28 Oct 2002 | British | 64 years |
| Robert Ian Horsford | Secretary | 30 Jun 2000 | 25 Jul 2002 | British | - |
| Sandra Margaret Ryan | Director | 26 Jan 2012 | 11 Nov 2016 | British | 61 years |
| Simon Peter Welch | Director | 31 Dec 2023 | 26 Apr 2024 | British | 50 years |