| Abigail Sarah Draper | Director | 31 Aug 2021 | 31 Mar 2025 | British | 56 years |
| Alan Smith | Director | 18 Aug 1991 | 31 Dec 1994 | British | 81 years |
| Allan Edward Townsend | Director | 13 Oct 1997 | 31 Jan 1999 | British | 87 years |
| Andrew Charles Wilson | Director | 18 Jul 2017 | 2 Nov 2017 | American | 55 years |
| Anthony John David Ferrar | Director | 1 Jan 1993 | 22 Jul 1993 | British | 69 years |
| Anthony John David Ferrar | Secretary | 1 Jan 1993 | 22 Jul 1993 | British | - |
| Anthony Vernon Williams | Director | 1 Feb 2001 | 31 Mar 2006 | British | 66 years |
| Bernard John Armstrong | Director | 18 Aug 1991 | 23 Dec 2010 | British | 77 years |
| Blair Michael Lavoie | Director | 24 Apr 2012 | 31 Aug 2021 | American | 64 years |
| Christopher John Hull | Director | 1 Feb 2004 | 23 Dec 2010 | British | 60 years |
| Christopher Roderick John Goscomb | Director | 23 Apr 1996 | 2 Oct 1997 | British | 74 years |
| David Brian Mclurgh | Secretary | 6 Mar 2019 | 27 Sept 2021 | - | - |
| David Frederick Wigram White | Director | 23 Apr 1996 | 24 May 2000 | British | 84 years |
| David Frederick Wigram White | Director | 1 Apr 2009 | 31 May 2009 | British | 84 years |
| David Griffin Barnes | Director | 23 Dec 2010 | 24 Apr 2012 | Usa | 65 years |
| David Griffin Barnes | Director | 7 Jul 2016 | 18 Jul 2017 | Usa | 65 years |
| David Thomas Marsh | Director | 1 Apr 2006 | 31 May 2009 | British | 56 years |
| Douglas Charles Benfield | Director | 18 Aug 1991 | 31 Mar 1993 | British | 89 years |
| Francesco Giuliani | Director | 21 May 2020 | 31 Aug 2021 | Italian | 54 years |
| Geoffrey Mark Renshaw | Director | 18 Aug 1991 | 30 Apr 1996 | British | 70 years |
| Gina Paola Maloney | Secretary | 5 Nov 2012 | 3 Aug 2018 | - | - |
| Ian James Mcaulay | Director | 5 Apr 2012 | 30 Aug 2013 | British | 61 years |
| James Graham Kuiken | Director | 30 Aug 2013 | 15 Jun 2016 | Usa | 72 years |
| James Lee | Director | 2 Nov 2018 | 31 Aug 2021 | American | 41 years |
| John Alastair Spence | Director | 1 Jan 1993 | 6 Jun 1994 | British | 76 years |
| John Ernest Alfred Kerslake | Secretary | 18 Aug 1991 | 24 Oct 1997 | British | - |
| John Patrick Abraham | Director | 1 Dec 2001 | 23 Dec 2010 | British | 58 years |
| John Patrick Abraham | Director | 17 Feb 2011 | 17 Feb 2015 | British | 58 years |
| Joseph Daniel Adams Jr | Director | 23 Dec 2010 | 5 Apr 2012 | Usa | 73 years |
| Kenneth Smith | Director | 1 Oct 1997 | 13 Jun 2000 | British | 78 years |
| Kenneth Smith | Secretary | 1 Oct 1997 | 13 Jun 2000 | British | - |
| Kevin David O'reilly | Director | 1 Apr 2006 | 23 Dec 2010 | British | 57 years |
| Kevin David O'reilly | Director | 27 Aug 2013 | 18 Jun 2014 | British | 57 years |
| Mark Studholme | Director | 1 Jan 2000 | 23 Dec 2010 | British | 62 years |
| Mark Wilson | Director | 1 Apr 2006 | 31 Mar 2009 | British | 65 years |
| Neil Anthony Green | Director | 2 Apr 2002 | 30 Aug 2002 | British | 61 years |
| Neville Crook | Director | 18 Aug 1991 | 6 Jun 1994 | British | 78 years |
| Norman Eric Dodd | Secretary | 13 Jun 2000 | 23 Dec 2010 | British | - |
| Paul Anthony Gledhill | Director | 20 Feb 2015 | 27 Jun 2016 | British | 65 years |
| Paul James Bresnan | Secretary | 2 Nov 2018 | 6 Mar 2019 | - | - |
| Paul Jeremy David Alpern | Director | 2 Nov 2017 | 2 Nov 2018 | Canadian | 62 years |
| Peter John Jarema | Director | 1 Feb 2001 | 31 Mar 2006 | British | 71 years |
| Peter Lee Robinson | Director | 18 Aug 1991 | 11 Nov 1992 | British | 89 years |
| Peter Lee Robinson | Director | 31 Mar 1993 | 25 Apr 1995 | British | 89 years |
| Roger Ingham | Director | 20 Oct 1997 | 18 Dec 2001 | British | 79 years |
| Rolfe Nuttall | Director | 17 Feb 2015 | 11 Dec 2017 | British | 61 years |
| Sarah Ann Moist | Secretary | 23 Dec 2010 | 1 Dec 2016 | - | - |
| Spencer Harold Greenhalgh | Director | 1 Oct 1997 | 31 Jan 2000 | British | 81 years |
| Thomas John Standring | Director | 1 Apr 2006 | 23 Dec 2010 | British | 67 years |
| Victoria Jayne Hall-sturt | Director | 23 Dec 2010 | 18 Feb 2011 | British | 53 years |
| Victoria Jayne Hall-sturt | Secretary | 18 Feb 2011 | 2 Nov 2018 | - | - |