| Aderemi Ladega | Secretary | 1 Feb 2008 | 30 Jun 2010 | British | - |
| Alan Henry Haywood | Director | 19 Nov 2003 | 1 Sept 2005 | British | 60 years |
| Alan Henry Haywood | Director | 1 May 2007 | 1 Nov 2014 | British | 60 years |
| Alan Henry Haywood | Director | 1 Jan 2017 | 1 Sept 2018 | British | 60 years |
| Alan Morrison Jones | Director | 1 Sept 1997 | 1 Feb 2000 | British | 82 years |
| Anne Cecille Quinn | Director | 31 Jul 1996 | 1 Feb 2000 | New Zealander | 75 years |
| Anthony Bryan Hayward | Director | 1 Sept 1997 | 1 Feb 2000 | British | 69 years |
| Brian Gilvary | Director | 1 Apr 2005 | 31 Dec 2009 | British | 64 years |
| Christopher Kuangcheng Gerald Eng | Secretary | 23 Mar 2009 | 30 Jun 2010 | - | - |
| David Stephen Fitzsimmons | Director | 1 May 2003 | 30 Dec 2004 | British | 71 years |
| David William Knipe | Director | 20 May 2013 | 1 Jul 2020 | British | 52 years |
| Dawn Noel | Secretary | 1 Feb 2006 | 3 Nov 2006 | British | - |
| Dominic Wood | Director | 20 Jan 2016 | 5 Oct 2016 | British | 50 years |
| Donald Paul Debrier | Director | 21 Jun 1992 | 31 May 1993 | American | 86 years |
| Douglas Martin Rotenberg | Director | 1 Jun 2003 | 16 Dec 2005 | Us Citizen | 63 years |
| Felipe Arbelaez | Director | 6 Mar 2015 | 20 Jan 2016 | British | 57 years |
| Fiona Anne Macleod | Director | 1 Mar 2002 | 19 Nov 2003 | British | 59 years |
| Gary Christian Greve | Director | 12 Mar 1996 | 1 Jul 1997 | Us Citizen | 77 years |
| Gregory David Bourne | Director | 1 Jan 1995 | 31 Aug 1997 | British | 78 years |
| Helen Jane Stanley | Secretary | 1 Feb 2000 | 19 Feb 2001 | British | - |
| Ian Springett | Director | 1 Aug 2005 | 7 Jul 2006 | British | 69 years |
| Janet Elvidge | Secretary | 3 Nov 2006 | 1 Feb 2008 | Other | - |
| Jason Kenney Tate | Director | 13 Jan 2020 | 22 Oct 2025 | American | 52 years |
| Paul Jonathan Reed | Director | 7 Jul 2006 | 1 Apr 2007 | British | 70 years |
| Paul Jonathan Reed | Director | 1 Jan 2010 | 1 Jan 2017 | British | 70 years |
| Peter James Mather | Director | 1 Feb 2000 | 1 Mar 2002 | British | 66 years |
| Robert Cameron Cumming | Secretary | 21 Jun 1992 | 1 Feb 2000 | British | - |
| Robert Stephen Lawson | Director | 1 Sept 2018 | 13 Jan 2020 | British | 56 years |
| Robin Dale Morris | Director | 31 May 1993 | 1 Jan 1995 | British | 80 years |
| Sharon Hyman Weintraub | Director | 1 Jul 2020 | 1 Jul 2023 | American | 61 years |
| Simon Philip Cattle | Director | 1 Feb 2006 | 10 Jan 2013 | British | 68 years |
| Steven Kyle Welch | Director | 1 Feb 2000 | 1 May 2003 | Us Citizen | 75 years |
| Steven Weston | Director | 1 Jan 1995 | 31 Aug 1997 | British | 73 years |
| Thomas John Bramley | Director | 21 Jun 1992 | 1 Jan 1995 | British | 87 years |
| Tony Fountain | Director | 1 Feb 2003 | 1 Apr 2005 | British | 66 years |
| Wilhelmus Petrus Martinus Maria Donkers | Director | 1 Sept 2005 | 30 Nov 2006 | Dutch | 64 years |
| Yasin Stanley Ali | Secretary | 19 Feb 2001 | 1 Feb 2006 | Other | - |
