| Alison Jane Hollow | Secretary | 26 Apr 1994 | 20 Jun 1994 | British | - |
| Andrea Margaret Thomas | Secretary | 11 Aug 1997 | 10 Sept 1997 | Other | - |
| Andrea Margaret Thomas | Secretary | 10 Sept 1997 | 19 Feb 2001 | Other | - |
| Andrea Margaret Thomas | Secretary | 21 Jul 2008 | 23 Mar 2009 | Other | - |
| Andrew Peter Matthew Blakeman | Director | 16 Sept 2011 | 1 May 2016 | British | 59 years |
| Anthony Michael Ryde | Director | 26 Feb 1993 | 31 Dec 1993 | British | 81 years |
| Antonio Manuel Patricio Comprido | Director | 1 Oct 1997 | 1 Aug 1999 | Portuguesie | 80 years |
| Bafelelang Priscillah Mabelane | Director | 1 Sept 2015 | 1 Aug 2017 | South African | 53 years |
| Blair Albert Okeefe | Director | 1 Feb 2003 | 1 Apr 2004 | New Zealander | 56 years |
| Bret William Holden | Director | 1 Oct 1997 | 16 Mar 1998 | American | 65 years |
| Catherine Ann Mccann | Director | 1 Jun 2008 | 15 Sept 2011 | British | 60 years |
| Christopher John Moorhouse | Director | 15 Oct 1996 | 16 Mar 1998 | British | 74 years |
| Christopher Kuangcheng Gerald Eng | Secretary | 23 Mar 2009 | 30 Jun 2010 | Other | - |
| David Charles Goosey | Director | 10 Jun 2002 | 1 Apr 2004 | British | 64 years |
| David Newton | Director | 1 Jul 2020 | 31 Dec 2020 | British | 58 years |
| David Timothy Jones | Director | 21 Jun 1992 | 30 Jun 1992 | British | 82 years |
| David William Parry | Director | 21 Jun 1992 | 31 Mar 1993 | British | 87 years |
| Dawn Noel | Secretary | 1 Feb 2006 | 3 Nov 2006 | British | - |
| Graham Charles Sims | Director | 1 Dec 2000 | 10 Aug 2006 | British | 68 years |
| Hanna Hofer | Director | 1 Jan 2021 | 1 Apr 2022 | Austrian | 54 years |
| Hilary Jane Edwards | Secretary | 1 Jan 1993 | 5 May 1994 | British | - |
| Ian Hamilton Struthers | Director | 1 Feb 2003 | 1 Aug 2003 | British | 64 years |
| James Henley Lamanna | Director | 1 Mar 2001 | 1 Apr 2003 | Us Citizen | 72 years |
| Janet Elizabeth Ashdown | Director | 10 Aug 2006 | 1 Sept 2009 | British | 67 years |
| Janet Elvidge | Secretary | 3 Nov 2006 | 21 Jul 2008 | Other | - |
| Jeffrey Mann Pitzer | Director | 1 Apr 2003 | 1 Jun 2004 | Us Citizen | 68 years |
| Jennifer Pauline Nagel | Director | 1 Aug 1999 | 1 Dec 2000 | Australian | 68 years |
| John David Williams | Director | 1 Feb 1995 | 1 Aug 1999 | British | 73 years |
| John Graham Mumford | Director | 16 Mar 1998 | 30 Dec 2006 | British | 78 years |
| John Robert Thomas | Director | 16 Mar 1998 | 1 Dec 2000 | American | 70 years |
| John Robert Wellwood Orange | Director | 21 Jun 1992 | 14 Oct 1996 | British | 84 years |
| Laurence Edwin Mallett | Secretary | 5 May 1994 | 10 Sept 1997 | British | - |
| Leslie-anne Allen | Director | 1 May 2016 | 10 Sept 2018 | British | 52 years |
| Martin Howard Welsh | Director | 17 Sept 2009 | 31 Oct 2014 | British | 68 years |
| Michael George Baker | Director | 5 May 1994 | 30 Sept 1997 | British | 80 years |
| Michel Henri Humbert De Fabiani | Director | 1 Oct 1997 | 24 Nov 1998 | French | 81 years |
| Neale Andrew Smither | Director | 1 Sept 2009 | 1 Sept 2015 | British | 62 years |
| Neil Emmett | Director | 22 Feb 2016 | 22 Mar 2019 | British | 56 years |
| Nicholas John Carrie | Director | 20 Jan 1994 | 31 Jan 1995 | British | 90 years |
| Nicola Louise Grady-smith | Director | 1 Aug 2017 | 1 Jul 2020 | British | 53 years |
| Nicola Susan May | Director | 22 Mar 2019 | 1 Feb 2021 | British | 56 years |
| Nigel John Wardle | Director | 24 Jul 2007 | 31 Aug 2009 | British | 73 years |
| Olufunmilola Adegbeyeni | Secretary | 16 Oct 2012 | 1 Jan 2014 | - | - |
| Paul Richard Maslin | Director | 1 Aug 1999 | 1 Mar 2001 | British | 76 years |
| Peter Alexander Short | Director | 1 Dec 2002 | 1 Oct 2004 | British | 71 years |
| Peter James Mather | Director | 30 Dec 2005 | 17 Dec 2021 | British | 66 years |
| Richard Mark Hookway | Director | 1 Oct 1997 | 1 Aug 1999 | British | 65 years |
| Richard Murray Preston | Director | 1 Dec 2000 | 1 Sept 2001 | British | 82 years |
| Rickey Dave Hale | Director | 16 Jun 2004 | 30 Jun 2007 | Us Citizen | 74 years |
| Roland Owen Druce Hoffman | Director | 1 Nov 2004 | 30 May 2008 | British | 77 years |
| Russell Graham Elden | Director | 21 Jun 1992 | 4 May 1994 | British | 92 years |
| Russell Graham Elden | Secretary | 21 Jun 1992 | 4 May 1994 | British | - |
| Ryan James Mcdonough | Director | 1 Feb 2021 | 2 May 2023 | American | 46 years |
| Saskia Alexandra Spence | Director | 2 May 2023 | 20 Aug 2025 | British | 37 years |
| Simon James Frank Lang | Director | 1 Sept 2000 | 1 Oct 2001 | British | 71 years |
| Sonya Leigh Adams | Director | 1 Apr 2022 | 1 Jun 2024 | Australian | 48 years |
| Sydney George Horsfield | Director | 1 Aug 1999 | 1 Sept 2000 | Us Citizen | 83 years |
| Vincent Ashley Oddie | Director | 1 Oct 2001 | 10 Jun 2002 | British | 68 years |
| William Ernest Kay | Director | 1 Oct 2001 | 1 Feb 2003 | Australian | 78 years |
| William George Warren Harland | Director | 10 Sept 2018 | 1 Jul 2025 | British | 51 years |
| Yasin Stanley Ali | Secretary | 19 Feb 2001 | 1 Feb 2006 | Other | - |
| Yvonne Margaret Mcallister | Secretary | 1 Jan 2014 | 16 Mar 2016 | - | - |