| Ailsa Zoya Longmuir | Director | 21 Mar 2022 | 26 Jun 2023 | British | 44 years |
| Alan Aldridge | Director | 29 Mar 2001 | 27 Jun 2002 | British | 75 years |
| Alan Bennett | Director | 6 Nov 2002 | 31 Oct 2007 | British | 74 years |
| Alan Kenneth Barlow | Director | 31 Jan 2020 | 5 Jul 2021 | Irish | 62 years |
| Amanda Jane King | Director | 18 Aug 2003 | 1 Aug 2006 | British | 57 years |
| Anders Palmgren | Director | 24 Feb 1992 | 19 Sept 1996 | British | 86 years |
| Andrew Neil Burton | Secretary | 30 Nov 1994 | 1 Sept 1998 | British | - |
| Anthony Stafford Reed | Director | 6 Dec 1991 | 1 Sept 1998 | British | 81 years |
| Benedict William John Thorpe Wright | Director | 14 Aug 2006 | 31 Oct 2007 | British | 54 years |
| Bleddyn William Vaughan Rees | Director | 1 Oct 2021 | 1 Feb 2024 | British | 41 years |
| Bryan Cooper | Director | 24 Feb 1992 | 1 Sept 1994 | British | 78 years |
| David Clarke | Director | 27 Jun 2002 | 18 Aug 2003 | British | 73 years |
| David Reginald Scorah | Director | 22 Aug 1995 | 14 Oct 1996 | British | 80 years |
| Eero Kalevi Auranne | Director | 19 May 1999 | 30 Mar 2000 | Finnish | 67 years |
| Esko Ilmari Salosaari | Director | 1 Jan 1992 | 24 Feb 1994 | Finnish | 76 years |
| Euan Thomas Mcgregor | Director | 1 May 1992 | 21 Jul 1995 | British | 68 years |
| Galan Rodney Harper Moss | Secretary | 1 Sept 1998 | 25 Nov 1998 | British | - |
| Graeme Stuart Collinson | Director | 13 Feb 2009 | 1 Jan 2014 | British | 70 years |
| Graham Joseph Hall | Director | 1 Apr 1993 | 1 Sept 1994 | British | 83 years |
| Graham Joseph Hall | Director | 1 Apr 1997 | 25 Nov 1998 | British | 83 years |
| Gregory Craig Mckenna | Director | 21 Mar 2022 | 3 Jun 2024 | British | 60 years |
| Ian Wood | Director | 6 Mar 2003 | 11 Feb 2004 | British | 68 years |
| Jacob Shields Ulrich | Director | 27 Jun 2002 | 6 Mar 2003 | British | 73 years |
| James Spence | Director | 31 Oct 2007 | 30 Jun 2010 | British New Zealand | 58 years |
| James Trevor Hopkinson | Director | 27 May 1992 | 1 Apr 1993 | British | 83 years |
| Jennifer Louise Archer | Director | 3 Feb 2025 | 27 May 2025 | British | 43 years |
| John Anthony Deane | Director | 30 Nov 1994 | 9 Oct 2000 | British | 80 years |
| John Edward Knight | Director | 1 Jan 2014 | 24 Oct 2014 | British | 60 years |
| John Frederick Watson Watts | Director | 31 Oct 2007 | 22 Apr 2014 | British | 72 years |
| John Malcolm Chatwin | Director | 6 Dec 1991 | 1 Sept 1994 | British | 81 years |
| John Malcolm Chatwin | Director | 8 Nov 1996 | 1 Apr 1997 | British | 81 years |
| Jonathan Cox | Director | 11 Mar 1999 | 23 Mar 2001 | British | 59 years |
| Jonathan Paul Bradley | Director | 11 Feb 2004 | 11 Mar 2008 | British | 70 years |
| Karin Ulrika Wising | Director | 3 Jun 2024 | 18 Dec 2024 | British,swedish | 53 years |
| Keith Eddington | Director | 18 Jun 1996 | 29 May 1998 | British | 80 years |
| Lauri Tapio Peltola | Secretary | 25 Nov 1998 | 27 Jun 2002 | British | - |
| Mark Ramsey Futyan | Director | 22 Apr 2014 | 6 Feb 2020 | British | 48 years |
| Mark Taylor | Director | 4 Oct 2016 | 30 Apr 2018 | British | 56 years |
| Martin Clinton Mannion | Director | 22 Jun 1995 | 23 Jun 1995 | British | 64 years |
| Martin Clinton Mannion | Director | 19 Sept 1996 | 18 Aug 2000 | British | 64 years |
| Michael Dennis | Director | 6 Nov 2019 | 7 May 2024 | British | 45 years |
| Michael John Garstang | Director | 27 Jun 2002 | 30 Jun 2008 | British | 78 years |
| Osmo Aleksi Lahelma | Director | 11 Mar 1999 | 30 Mar 2000 | Finnish | 77 years |
| Paul Stephen Lawton | Director | 5 Jul 2021 | 1 Oct 2021 | British | 60 years |
| Pekka Juhani Kallenpoika Osterlund | Director | 11 Mar 1999 | 27 Jun 2002 | British | 73 years |
| Peter Frederick Leopold Koch De Gooreynd | Director | 2 Feb 2015 | 5 Sept 2016 | British | 68 years |
| Philip Bryan Morgan | Director | 24 Feb 1992 | 1 May 1992 | British | 83 years |
| Philip Bryan Morgan | Director | 2 Sept 1994 | 8 Nov 1996 | British | 83 years |
| Richard Matthew Mccord | Director | 15 Nov 2013 | 6 Nov 2019 | British | 53 years |
| Robert Anthony Jones | Director | 1 Nov 2000 | 27 Mar 2001 | British | 60 years |
| Roger Dickinson | Secretary | 4 Feb 1992 | 30 Nov 1994 | British | - |
| Sarah Marie Davenport Christie | Secretary | 1 Sept 1998 | 25 Nov 1998 | British | - |
| Sarwjit Sambhi | Director | 11 Mar 2008 | 12 Aug 2013 | British | 57 years |
| Simon Jonathan Goodwin | Director | 6 Mar 2003 | 11 Feb 2004 | British | 64 years |
| Simon Jonathan Goodwin | Director | 11 Feb 2004 | 31 Oct 2007 | British | 64 years |
| Stephen David Guy | Director | 29 May 1998 | 25 Nov 1998 | British | 77 years |
| Stephen John Mancey | Director | 27 Jun 2002 | 6 Nov 2002 | British | 71 years |
| Stephen John Mancey | Director | 6 Mar 2003 | 11 Feb 2004 | British | 71 years |
| Steven Binks | Director | 17 Dec 1991 | 1 Sept 1994 | British | 73 years |
| Stuart Alexander Thom | Director | 7 May 2024 | 6 Sept 2024 | British | 52 years |
| Thomas Edward Hinton | Director | 30 Jun 2010 | 15 Nov 2013 | British | 47 years |
| Tiina Marjukka Tuomela | Director | 29 Mar 2001 | 27 Jun 2002 | British | 60 years |
| Tudor George Townsend | Director | 14 Oct 1996 | 25 Nov 1998 | British | 77 years |
| Valerie Lee Kohler | Director | 18 Sept 2000 | 27 Jun 2002 | American | 71 years |
| Veikko Johannes Anttila | Director | 24 Jun 1992 | 30 Nov 1994 | Finnish | 84 years |
| William John Wilkinson | Director | 2 Sept 1994 | 18 Jun 1996 | British | 80 years |