| Alan John Porter | Director | 27 Jul 1992 | 16 Dec 1996 | British | 80 years |
| Andrea Margaret Thomas | Secretary | 1 Sept 1997 | 1 Oct 2003 | Other | - |
| Anthony Talbot Heffernan James Considine | Director | 1 Dec 1997 | 1 Dec 2002 | Irish | 72 years |
| Athanasios Rigas | Director | 1 May 2019 | 30 Jun 2022 | Greek | 59 years |
| Brian Peevor | Secretary | 9 Feb 1994 | 31 Aug 1997 | British | - |
| Cassandra Higham | Director | 21 Sept 2020 | 1 Jun 2025 | British | 47 years |
| Craig Thomas Widner | Director | 15 Jun 2012 | 10 Feb 2016 | American | 61 years |
| Daniel Chukumah Odogwu | Director | 1 Nov 2017 | 31 Dec 2018 | British | 60 years |
| David Andrew James Baldry | Director | 30 Dec 2002 | 1 May 2004 | British | 71 years |
| David Charles Goosey | Director | 1 Nov 2012 | 1 Apr 2015 | British | 64 years |
| David Coleman | Director | 16 Dec 1996 | 1 Mar 1999 | British | 69 years |
| Felipe Posada | Director | 1 Mar 1999 | 30 Dec 2000 | Colombian | 60 years |
| Fiona Victoria Ryder | Director | 31 Oct 2015 | 1 Aug 2018 | British | 51 years |
| Frederic Jean Baudry | Director | 15 Sept 2006 | 18 Mar 2009 | French | 61 years |
| Gary Edward Reading | Director | 1 May 2019 | 1 Jun 2025 | British | 54 years |
| Gerard Francis Whitely | Director | 1 May 2004 | 15 Sept 2006 | Australian | 64 years |
| Gillian Elizabeth Young | Secretary | 27 Jul 1992 | 9 Feb 1994 | British | - |
| Gregory David Bourne | Director | 27 Jul 1992 | 1 Oct 1992 | Australian | 78 years |
| Jens Jacob Andersen | Director | 10 Feb 2016 | 1 May 2019 | Danish | 56 years |
| John Joseph Carey | Director | 1 Jun 2010 | 1 Apr 2014 | Irish,american | 64 years |
| Jorge Manuel Da Silva Tavares | Director | 27 Jul 1992 | 31 May 1993 | Portuguese | 85 years |
| Kamuran Yazganoglu | Director | 1 Jan 2019 | 16 Apr 2020 | Turkish | 50 years |
| Kevin Lee James | Director | 1 Dec 2002 | 15 Sept 2006 | American | 69 years |
| Luigi Tedesco | Director | 25 Mar 2009 | 31 Oct 2012 | Italian | 58 years |
| Lynn Paul Waterman | Director | 1 Aug 2009 | 1 Jun 2010 | British | 62 years |
| Marcia Anne Brand | Director | 1 Apr 2014 | 1 Apr 2015 | American | 66 years |
| Mario Mifsud | Director | 30 Jun 2022 | 27 May 2024 | British | 57 years |
| Mark William Keogh | Director | 30 Dec 2000 | 30 Dec 2002 | Irish | 65 years |
| Mathieu Antoine Boulandet | Director | 15 Oct 2024 | 6 Jan 2025 | French | 44 years |
| Neil Tilley | Director | 16 Apr 2020 | 21 Sept 2020 | British | 62 years |
| Paul Anthony Chappell | Director | 15 Mar 2011 | 31 Oct 2015 | British | 65 years |
| Paul Ian Winton Turner | Director | 1 Apr 2015 | 1 Nov 2017 | British | 63 years |
| Paul Trevor Davis | Director | 1 Oct 1992 | 22 Jan 1998 | British | 79 years |
| Rebecca Jayne Wright | Secretary | 1 Aug 2004 | 30 Jun 2010 | Other | - |
| Rita Elizabeth Griffin | Director | 1 Feb 2007 | 16 Mar 2009 | American | 63 years |
| Robert David Mutchell | Director | 11 Sept 2018 | 1 May 2019 | British | 52 years |
| Stuart Antony Daniels | Secretary | 1 Oct 2003 | 1 Aug 2004 | British | - |
| Sue Hodel Rataj | Director | 15 Sept 2006 | 1 Feb 2007 | United States | 69 years |
