| Alan Malcolm Chater | Director | 1 Apr 2003 | 31 Mar 2010 | British | 75 years |
| Andrew Bernard Pitcher | Director | 1 Mar 1997 | 15 May 2002 | British | 79 years |
| Andrew John Cornish | Director | 15 Sept 2010 | 5 Aug 2011 | British | 60 years |
| Annabel Louise Pearce | Director | 20 Mar 2013 | 6 Oct 2016 | British | 51 years |
| Anthony John Keeler | Director | 26 Feb 2001 | 9 Jul 2010 | British | 82 years |
| Anthony Robert Morton | Director | 16 Nov 1993 | 24 Nov 2004 | British | 85 years |
| Brian Michael Bettesworth | Director | 1 Jan 2005 | 15 Feb 2014 | British | 76 years |
| Clive Campbell Holmes | Director | 5 Nov 2001 | 21 May 2015 | British | 76 years |
| Clive Campbell Holmes | Secretary | 2 May 2002 | 21 May 2015 | British | - |
| David Heimann | Director | 11 Oct 1991 | 5 Jun 1994 | British | 89 years |
| Dean Trevor Smith | Director | 23 May 2014 | 11 Oct 2018 | British | 58 years |
| Eamonn Feeney | Director | 31 May 2011 | 30 Sept 2015 | British | 71 years |
| Geoffrey Neil Battman | Director | 11 Mar 1992 | 30 Jun 1994 | British | 93 years |
| Geoffrey Phillips | Director | 1 Mar 1997 | 26 Feb 2002 | British | 71 years |
| Gwynneth Page | Director | 11 May 2022 | 26 Jul 2023 | British | 52 years |
| James Ross Hiley | Director | 18 Feb 2019 | 3 Feb 2020 | British | 56 years |
| Jeffrey Kenneth Houlgrave | Director | 1 Mar 1997 | 31 Mar 1999 | British | 73 years |
| Johann Lesley Robinson | Director | 11 Nov 2015 | 19 Jan 2018 | British | 65 years |
| John George Watson | Director | 1 Jan 2001 | 30 Jun 2003 | British | 68 years |
| John Michael Dean | Director | 11 Oct 1991 | 17 Nov 1992 | British | 87 years |
| Jonathan Eads | Director | 21 Jan 2004 | 29 Nov 2013 | British | 64 years |
| Jonathan Peter Marcer | Director | 1 Mar 1997 | 30 Sept 1998 | British | 62 years |
| Jonathan Peter Marcer | Secretary | 1 Mar 1997 | 30 Sept 1998 | British | - |
| Lisa Jane Gordon | Director | 26 Jan 2011 | 25 Jul 2013 | British | 60 years |
| Mark William Bowden | Director | 1 Mar 1997 | 9 Feb 2001 | British | 67 years |
| Matthew Edward John Stone | Director | 1 Sept 1999 | 30 Apr 2002 | British | 63 years |
| Michael Gerald Spencer | Director | 11 Oct 1991 | 30 Jun 1992 | British | 79 years |
| Michael James Glanville | Director | 2 May 2018 | 9 May 2025 | British | 48 years |
| Michael John Tufnell | Director | 11 Oct 1991 | 30 Jun 2000 | British | 83 years |
| Michael John Tufnell | Secretary | 11 Oct 1991 | 1 Mar 1997 | British | - |
| Philip Mason | Director | 11 Oct 1991 | 1 Jun 1993 | British | 76 years |
| Richard Anthony Broadribb | Director | 14 Dec 2018 | 31 Dec 2023 | British | 56 years |
| Richard John Amesbury-page | Director | 12 Sept 2023 | 31 Aug 2025 | British | 56 years |
| Robert Daniel George Grant | Director | 19 Dec 2017 | 30 Nov 2018 | British | 49 years |
| Robert Ian Horsford | Director | 30 Sept 1998 | 28 Oct 2002 | British | 64 years |
| Robert Ian Horsford | Secretary | 30 Sept 1998 | 2 May 2002 | British | - |
| Robert Peter Richard Iliffe | Director | 11 Oct 1991 | 31 Dec 2010 | British | 82 years |
| Sandra Margaret Ryan | Director | 26 Jan 2012 | 11 Nov 2016 | British | 61 years |
| Simon Talbot Gray | Director | 11 Oct 1991 | 11 Dec 2012 | British | 88 years |
| Sonya Lorraine Richards | Director | 24 Nov 2004 | 31 Dec 2010 | British | 57 years |