| Alan Morrison Jones | Director | 1 Jul 1998 | 30 Apr 2000 | British | 82 years |
| Alan Richard Turner | Secretary | 1 May 1992 | 15 Jun 1992 | British | - |
| Angelica Ruiz Celis | Director | 2 Jul 2020 | 6 Jul 2022 | Mexican | 53 years |
| Anne-frederique Saloway | Director | 1 Nov 2021 | 15 Oct 2025 | French | 59 years |
| Anneli Groth Frederiksen | Director | 25 Jun 2019 | 31 Jan 2021 | Danish | 56 years |
| Anthony Bryan Hayward | Director | 1 Feb 1996 | 31 Aug 1997 | British | 69 years |
| Anthony Bryan Hayward | Director | 20 Sept 1999 | 31 Aug 2000 | British | 69 years |
| Bradley Charles Richardson | Director | 1 Dec 1999 | 31 Dec 2000 | American | 68 years |
| Brian Michael Puffer | Director | 8 Mar 2010 | 6 Feb 2018 | British,american | 57 years |
| Byron Elmer Grote | Director | 1 Feb 1996 | 1 Jul 1997 | British | 78 years |
| Christopher Kuangcheng Gerald Eng | Secretary | 23 Mar 2009 | 30 Jun 2010 | - | - |
| Colin Robert Goodall | Director | 1 May 1993 | 1 Jan 1995 | British | 82 years |
| David Anthony Lawson Jenkins | Director | 1 May 1992 | 1 Jan 1995 | British | 88 years |
| David Christopher Allen | Director | 1 Feb 1996 | 28 Feb 1999 | British | 72 years |
| David Fricke Work | Director | 1 Mar 1999 | 31 Aug 1999 | United States | 81 years |
| David Geoffrey Philip Eyton | Director | 1 Jun 1999 | 1 Dec 1999 | British | 65 years |
| David James Loosley | Director | 14 May 2010 | 6 Oct 2016 | British | 68 years |
| Felipe Arbelaez | Director | 6 Apr 2018 | 2 Jul 2020 | British | 57 years |
| Felipe Posada | Director | 1 Jul 2009 | 14 May 2010 | Colombian | 60 years |
| Francis William Michael Starkie | Director | 1 Jul 2007 | 30 Sept 2009 | British | 77 years |
| Janet Elvidge | Secretary | 1 Aug 2004 | 1 Feb 2006 | Other | - |
| John Edward Lynch Jr | Director | 1 Mar 2003 | 1 Aug 2006 | American | 74 years |
| John Harold Bartlett | Director | 1 Sept 1997 | 27 Feb 2012 | British | 73 years |
| Kevin Hostler | Director | 1 May 2000 | 31 Aug 2001 | Us Citizen | 71 years |
| Maria Antonieta Viso Penso | Director | 14 May 2010 | 6 Apr 2018 | Venezuelan | 61 years |
| Mark Robert Bly | Director | 1 Sept 2001 | 3 Feb 2003 | Us Citizen | 67 years |
| Mark Woolveridge | Director | 1 May 1992 | 1 May 1993 | British | 91 years |
| Michael Ray Ivy | Director | 1 Mar 1999 | 1 Dec 1999 | United States | 73 years |
| Richard Lynn Morrison | Director | 1 Oct 2001 | 11 May 2007 | Us Citizen | 68 years |
| Robert Cameron Cumming | Secretary | 15 Jun 1992 | 31 Mar 2002 | British | - |
| Robin Dale Morris | Director | 1 Feb 1996 | 28 Feb 1999 | British | 80 years |
| Robin Dale Morris | Director | 1 Sept 2001 | 3 Feb 2003 | British | 80 years |
| Roger Christopher Harrington | Director | 1 Oct 2009 | 8 Mar 2010 | British | 60 years |
| Roger Terence Martin | Director | 5 Feb 1996 | 31 Aug 1997 | British | 75 years |
| Roy Leslie Tooley | Secretary | 11 Feb 2002 | 1 Oct 2003 | British | - |
| Sandra Jean Macrae | Director | 27 Feb 2012 | 25 Jun 2019 | British | 63 years |
| Stephen Marshall | Director | 1 May 2000 | 31 Aug 2001 | British | 72 years |
| Steven Weston | Director | 1 Jan 1995 | 9 Feb 1996 | British | 73 years |
| Stuart Antony Daniels | Secretary | 1 Oct 2003 | 1 Aug 2004 | British | - |
| Thomas Walter Arthur Wright | Director | 1 Jan 1995 | 9 Feb 1996 | British | 75 years |
| William Ellis Armstrong | Director | 1 Sept 1997 | 28 Feb 1999 | British | 69 years |
| William Ellis Armstrong | Director | 1 Sept 2001 | 1 Jul 2009 | British | 69 years |
| Yasin Stanley Ali | Secretary | 1 Feb 2006 | 30 Jun 2010 | Other | - |