| Albert Richard Wylie | Director | 26 Oct 1992 | 31 Dec 1996 | British | 82 years |
| Andrew John Bowman | Director | 1 Dec 2014 | 5 Mar 2018 | British | 54 years |
| Andrew John Bowman | Director | 7 Dec 2021 | 21 Jun 2022 | British | 54 years |
| Ann Hird | Director | 23 Apr 2012 | 15 Nov 2012 | British | 69 years |
| Anthony Nicholas Greatorex | Director | 3 Feb 2014 | 1 Dec 2014 | British | 58 years |
| Antony Vincent Holt | Director | 22 Oct 2008 | 23 Apr 2012 | British | 67 years |
| Brian James Wickens | Director | 30 Sept 1993 | 31 Dec 1996 | British | 87 years |
| Charles Anthony Earnshaw | Director | 30 Sept 1993 | 31 Dec 1996 | British | 73 years |
| Colin David Sewell | Director | 26 Oct 1992 | 31 Dec 1996 | British | 82 years |
| David Nicolas Garbourne Mason | Director | 30 Sept 1993 | 27 Dec 1995 | British | 83 years |
| David Paul Duffy | Director | 26 Oct 1992 | 31 Dec 1996 | British | 78 years |
| David William Crawford | Director | 30 Aug 2013 | 6 Dec 2013 | British | 56 years |
| Edwin Leopold Dalton | Director | 26 Oct 1992 | 31 Dec 1996 | British | 88 years |
| Francesca Anne Todd | Director | 5 Mar 2018 | 10 Dec 2021 | British | 55 years |
| George Boden | Director | 26 Oct 1992 | 9 Sept 2008 | British | 80 years |
| Herbert John Wynn | Director | 26 Oct 1992 | 25 Nov 1993 | British | 94 years |
| Jane Edith Wallis | Director | 26 Oct 1992 | 31 Dec 1996 | British | 76 years |
| Janet Susan Hayter | Director | 26 Oct 1992 | 31 Dec 1996 | British | 78 years |
| Jeremy Peter Small | Secretary | 22 Dec 2008 | 23 Apr 2012 | British | - |
| John Barry Swain | Director | 26 Oct 1992 | 31 Dec 1996 | British | 79 years |
| John Robert Simmonds | Director | 1 Jun 2009 | 16 Aug 2010 | British | 69 years |
| Michael Andrew Twinning | Secretary | 26 Oct 1992 | 27 Oct 1992 | British | - |
| Nicholas Mckenzie Herbert Burns | Director | 19 Mar 2008 | 12 Aug 2014 | British | 59 years |
| Nicolas Norman Bedford | Director | 23 Apr 2012 | 4 May 2012 | British | 67 years |
| Paul Bradley | Director | 26 Oct 1992 | 31 Dec 1996 | British | 79 years |
| Peter Gray | Director | 26 Oct 1992 | 31 Mar 2010 | British | 80 years |
| Philip John Anderson | Director | 19 Mar 2008 | 23 Apr 2012 | British | 62 years |
| Simon Lawrence Vernon Cole | Secretary | 27 Oct 1992 | 22 Dec 2008 | British | - |
| Stephen Charles Carrodus | Director | 30 Sept 1993 | 31 Dec 1996 | British | 74 years |
| Stephen Sharp | Director | 23 Apr 2012 | 3 Feb 2014 | British | 61 years |
| Susan Lesley Ring | Director | 12 Aug 2014 | 5 Mar 2018 | British | 65 years |