| Aderemi Ladega | Secretary | 11 Apr 2005 | 30 Jun 2010 | British | - |
| Alan Henry Haywood | Director | 1 Apr 2010 | 1 Nov 2014 | British | 60 years |
| Alan Henry Haywood | Director | 1 Jan 2017 | 20 Aug 2020 | British | 60 years |
| Andrea Margaret Thomas | Secretary | 1 Sept 1997 | 1 Oct 2003 | Other | - |
| Andrea Margaret Thomas | Secretary | 1 Aug 2004 | 11 Apr 2005 | Other | - |
| Brian Gilvary | Director | 1 Apr 2005 | 31 Dec 2009 | British | 64 years |
| Brian Michael Puffer | Director | 5 Jan 2018 | 1 Feb 2024 | British,american | 57 years |
| Brian Peevor | Secretary | 1 Feb 1993 | 17 Nov 1993 | British | - |
| Brian Peevor | Secretary | 1 Apr 1994 | 31 Aug 1997 | British | - |
| Byron Elmer Grote | Director | 17 Nov 1993 | 31 Dec 1993 | British And Us Citizen | 78 years |
| Carey Jude Mendes | Director | 1 Jan 2012 | 5 Oct 2015 | Canadian | 58 years |
| Carol-lee Howle | Director | 13 Jan 2020 | 20 Aug 2020 | British | 54 years |
| Caryn Ryan | Director | 1 Oct 2000 | 1 May 2002 | Us Citizen | 69 years |
| Christopher John Moorhouse | Director | 1 Oct 2000 | 1 Dec 2001 | British | 74 years |
| David James Bucknall | Director | 1 Nov 2014 | 1 Jan 2018 | British | 58 years |
| David James Bucknall | Director | 19 Aug 2020 | 30 Sept 2021 | British | 58 years |
| David William Knipe | Director | 16 Dec 2010 | 1 Jan 2012 | British | 52 years |
| Douglas Patrick Chapman | Director | 1 Oct 1996 | 1 Feb 2003 | British | 76 years |
| Felipe Arbelaez | Director | 5 Oct 2015 | 20 Jan 2016 | British | 57 years |
| Francis William Michael Starkie | Director | 1 Oct 1996 | 1 Oct 2000 | British | 77 years |
| Gary Christian Greve | Director | 1 Jan 1994 | 31 Aug 1995 | Us Citizen | 77 years |
| Ian Springett | Director | 1 Aug 2005 | 7 Jul 2006 | British | 69 years |
| James Grant Nemeth | Director | 1 Feb 2003 | 3 Aug 2005 | Us Citizen | 69 years |
| Joachim Martin Mies | Director | 7 Jan 2008 | 1 Feb 2013 | German | 64 years |
| John Gordon Sinclair Buchanan | Director | 1 Sept 1995 | 30 Sept 1996 | British | 83 years |
| John Porter Adams | Secretary | 21 Feb 1991 | 1 Feb 1993 | British | - |
| John Robert Wellwood Orange | Director | 13 Mar 1992 | 17 Nov 1993 | British | 84 years |
| Julian John Watts | Secretary | 17 Nov 1993 | 31 Mar 1994 | New Zealand | - |
| Katrina Ann Landis | Director | 25 Feb 2007 | 4 Dec 2007 | United States | 67 years |
| Macsen Jay Nuttall | Director | 2 Aug 2016 | 1 Oct 2018 | British | 58 years |
| Michael John O'sullivan | Director | 1 Feb 2013 | 1 Nov 2014 | British | 62 years |
| Paul Jonathan Reed | Director | 7 Jul 2006 | 25 Feb 2007 | British | 70 years |
| Paul Jonathan Reed | Director | 7 Jan 2008 | 1 Jan 2017 | British | 70 years |
| Raymond Keith Hinkley | Director | 17 Nov 1993 | 30 Sept 1996 | British | 79 years |
| Raymond Keith Hinkley | Director | 1 May 2002 | 30 Dec 2004 | British | 79 years |
| Robert Stephen Lawson | Director | 1 Oct 2018 | 13 Jan 2020 | British | 56 years |
| Russell Graham Elden | Director | 21 Feb 1991 | 17 Nov 1993 | British | 92 years |
| Samantha Elizabeth Skerry | Director | 20 Jan 2016 | 2 Aug 2016 | British | 51 years |
| Sharon Hyman Weintraub | Director | 19 Aug 2020 | 28 Jul 2023 | American | 61 years |
| Stephen Nussey | Director | 17 Nov 1993 | 30 Sept 1996 | British | 75 years |
| Stuart Antony Daniels | Secretary | 1 Oct 2003 | 1 Aug 2004 | British | - |
| Sven Roger Boss-walker | Director | 30 Sept 2021 | 18 Jun 2024 | Australian | 49 years |
| Timothy Bullock | Director | 25 Feb 2007 | 1 Dec 2010 | British | 65 years |
| Tony Fountain | Director | 1 May 2003 | 1 Nov 2003 | British | 66 years |
| Tony Fountain | Director | 30 Dec 2004 | 1 Apr 2005 | British | 66 years |
| Trine Lise Juliussen | Director | 14 Oct 2022 | 1 Sept 2024 | Norwegian | 45 years |
| Vivian Thomas | Director | 21 Feb 1991 | 12 Mar 1992 | British | 94 years |
| Vivienne Cox | Director | 1 Dec 2001 | 25 Feb 2007 | British | 67 years |
| Yasin Stanley Ali | Secretary | 19 Feb 2001 | 30 Jun 2010 | - | - |
