| Adebayo Olaoluwa Adeyeye | Secretary | 5 Mar 2020 | 10 Sept 2020 | - | - |
| Alan Christopher Hugh Richards | Director | 1 Sept 1993 | 28 Feb 1995 | British | 67 years |
| Alistair John Chamberlain | Director | 16 Aug 2023 | 28 Jun 2024 | British | 50 years |
| Andrew Barry Millard | Director | 10 Apr 1995 | 29 Nov 2001 | British | 71 years |
| Andrew Douglas Van Den Aardweg | Director | 1 Sept 2014 | 31 Dec 2023 | South African,british | 72 years |
| Andrew Stuart Watson | Director | 11 Feb 2009 | 3 Nov 2009 | British | 64 years |
| Anthony Joseph Ashford | Director | 4 Mar 1993 | 18 Nov 2004 | British | 77 years |
| Anthony Michael Mahoney | Director | 18 Nov 2004 | 21 Sept 2007 | British | 64 years |
| Anthony Philip Hope | Director | 4 Mar 1993 | 10 Mar 2006 | British | 79 years |
| Anthony Philip Hope | Director | 10 Mar 2006 | 1 Nov 2006 | British | 79 years |
| Antonio Pedro Dos Santos Simoes | Director | 1 Nov 2012 | 13 Dec 2012 | Portugese | 51 years |
| Bernard David Goldberg | Director | 22 Feb 2006 | 24 Jul 2008 | American | 61 years |
| Bernard David Goldberg | Director | 1 Sept 2000 | 30 Nov 2005 | American | 61 years |
| Brendan Alistair Cook | Director | 28 Sept 2011 | 20 Feb 2014 | British | 64 years |
| Brian Robertson | Director | 3 Dec 2010 | 1 Sept 2014 | British | 72 years |
| Bruce Alan Fletcher | Director | 31 Dec 2009 | 31 Mar 2011 | American | 66 years |
| Bruce Anthony Howe | Director | 14 Dec 2009 | 30 Jun 2012 | Australian | 71 years |
| Carlos Eduardo Cavalcanti Wanderley | Director | 9 Jan 2007 | 10 Oct 2007 | Brazilian | 61 years |
| Charlotte Caulfield | Secretary | 27 May 2016 | 8 Jun 2017 | - | - |
| Christen Schnor | Director | 3 Jul 2007 | 17 Dec 2008 | British | 67 years |
| Colin Martin Kersley | Director | 30 Jan 2008 | 1 Jan 2009 | British | 70 years |
| Colin Peter Startup | Director | 16 May 1995 | 31 Aug 1997 | British | 67 years |
| Craig Anthony Colton | Director | 29 Oct 2004 | 3 Jul 2007 | British | 58 years |
| David Ian Wishart Reynolds | Director | 4 Mar 1993 | 31 Aug 1995 | British | 83 years |
| David Ian Wishart Reynolds | Director | 1 Aug 2003 | 26 Feb 2008 | British | 83 years |
| David John Beynon | Director | 4 Mar 1993 | 23 Sept 1993 | British | 76 years |
| David John Mills | Director | 15 Oct 1993 | 7 Feb 2002 | British | 82 years |
| David Johnstone Mackay | Director | 22 Dec 2003 | 26 Jan 2005 | British | 68 years |
| Dean Robert Buckley | Director | 1 Feb 2002 | 30 Oct 2007 | British | 66 years |
| Dennis Jack Smith | Director | 12 Mar 2009 | 28 Jan 2010 | British | 67 years |
| Elizabeth Anne Hobley | Secretary | 1 Jul 2001 | 5 Sept 2002 | British | - |
| Francesca Jane Mcdonagh | Director | 12 Mar 2014 | 1 Jul 2017 | British | 51 years |
| Harpal Singh Karlcut | Director | 1 Sept 2000 | 31 Jul 2006 | British | 62 years |
| Helen Docherty | Secretary | 26 Feb 2013 | 10 Oct 2013 | - | - |
| Ian St John Martin | Director | 12 Nov 2006 | 8 Jul 2014 | British | 62 years |
| Ishrat Maqsood Kiyani | Director | 4 Mar 2005 | 19 Sept 2006 | British | 67 years |
| James William Russell Davies | Director | 27 May 2009 | 7 Mar 2014 | British | 60 years |
| Jeffrey Edward Pearson | Director | 4 Mar 1993 | 28 Feb 1995 | British | 74 years |
| Jesujuwonlo Williams | Secretary | 7 Mar 2019 | 10 Sept 2020 | - | - |
| John Bannister Hackett | Director | 11 Apr 2013 | 2 Jun 2015 | British | 58 years |
| John Peter Hamilton Merry | Director | 26 Aug 2005 | 8 Aug 2006 | British | 76 years |
| John Terence Walker | Director | 4 Mar 1993 | 11 Jun 2002 | British | 75 years |
| Johnson Daniel Garner | Director | 17 Dec 2009 | 31 Oct 2012 | British | 57 years |
| Jonathan David Moore | Director | 26 Oct 2007 | 12 Feb 2010 | British | 53 years |
| Kate Elizabeth Hudson | Secretary | 25 Sept 2009 | 26 Feb 2013 | - | - |
| Katie Louise Danby | Director | 1 Apr 2021 | 17 Oct 2022 | British | 53 years |
| Keith Roderick Whitson | Director | 28 Jul 1993 | 1 Mar 1996 | British | 83 years |
| Keith Victor Smithson | Director | 29 Nov 2001 | 2 Dec 2003 | Irish | 64 years |
| Kerry Barton Alberti | Director | 4 Mar 1993 | 31 Jul 1993 | American | 82 years |
| Margot Cronin | Director | 17 Feb 2016 | 30 Sept 2023 | Irish | 63 years |
| Mark Christopher John Hews | Director | 3 Aug 2007 | 12 Feb 2009 | British | 57 years |
| Mark Erden Hussein | Director | 15 Mar 2005 | 9 Jul 2007 | British | 60 years |
| Mary Josephine Margaret Mcnalty | Secretary | 10 Oct 2013 | 9 Dec 2014 | - | - |
| Michael James Lifford Macnaughtan Hawes | Director | 2 Dec 2003 | 11 Dec 2006 | British | 62 years |
| Michael John Bolton | Director | 13 Sept 2011 | 30 Jun 2019 | British | 76 years |
| Nathan Victor Moss | Director | 4 Mar 1993 | 12 Jun 2002 | British | 71 years |
| Neil Richard Davies | Director | 18 Dec 2013 | 31 Dec 2019 | British | 58 years |
| Nicola Suzanne Black | Secretary | 6 Sept 2002 | 21 Feb 2005 | British | - |
| Nigel Barker | Secretary | 4 Mar 1993 | 30 Jun 2001 | British | - |
| Nigel Grant Hinshelwood | Director | 28 Sept 2011 | 4 Apr 2013 | British | 60 years |
| Nigel John Cooke | Director | 6 Jun 2014 | 31 Dec 2019 | British | 71 years |
| Nigel Robert Trout | Director | 30 Sept 2004 | 26 Aug 2005 | British | 66 years |
| Noel Paul Quinn | Director | 2 Feb 2010 | 31 Mar 2011 | British | 64 years |
| Paul Anthony Thurston | Director | 17 Dec 2009 | 30 Nov 2010 | British | 73 years |
| Paul Kenneth Seward | Director | 8 Jan 2013 | 31 Dec 2019 | British | 70 years |
| Pauline Louise Mcquillan | Secretary | 2 Sept 2008 | 24 Sept 2009 | Other | - |
| Perry Ian Thomas | Director | 9 Oct 2014 | 1 Aug 2015 | British | 59 years |
| Peter Geoffrey Ward | Director | 4 Mar 1993 | 31 Aug 1995 | English | 84 years |
| Peter James Harvey | Secretary | 21 Feb 2005 | 2 Sept 2008 | Other | - |
| Philip John Blackmore | Director | 6 Mar 2007 | 18 Dec 2008 | British | 61 years |
| Philip John Tremble | Director | 23 Mar 2011 | 9 Aug 2012 | British | 64 years |
| Philip Rhodes | Director | 4 Mar 1993 | 31 Aug 1995 | British | 75 years |
| Rhys Williams | Secretary | 8 Dec 2017 | 4 Dec 2018 | - | - |
| Richard Frederick Farrand | Director | 1 Sept 2000 | 30 Sept 2004 | British | 65 years |
| Richard Michael James Orgill | Director | 1 Mar 1996 | 31 Dec 1998 | British | 88 years |
| Robert Andrew Lang | Director | 31 Jul 2006 | 24 Nov 2008 | British | 53 years |
| Robert Andrew Lang | Director | 24 Nov 2008 | 1 Jan 2011 | British | 53 years |
| Robert Graham | Director | 4 Mar 1993 | 31 Aug 1995 | British | 79 years |
| Rodney Jympson Duke | Director | 8 Feb 2002 | 24 May 2004 | British | 76 years |
| Roy George Heape | Director | 4 Mar 1993 | 31 Mar 1997 | British | 95 years |
| Sarah Harvey | Secretary | 4 Dec 2018 | 28 Feb 2019 | - | - |
| Simeon Thomas Brown | Director | 19 Dec 2007 | 28 Jan 2010 | British | 60 years |
| Simon Andrew Donohoe | Director | 4 Mar 1993 | 31 Oct 2001 | British | 85 years |
| Simon Wainwright | Director | 15 Mar 2011 | 11 Nov 2011 | British | 63 years |
| Stephen Mark Coombes | Director | 18 Dec 2008 | 31 Aug 2013 | British | 69 years |
| Steven Geoffrey Troop | Director | 9 Nov 2005 | 9 Nov 2005 | British | 70 years |
| Steven Geoffrey Troop | Director | 14 Dec 2005 | 10 Mar 2006 | British | 70 years |
| Steven Geoffrey Troop | Director | 10 Mar 2006 | 21 Jun 2007 | British | 70 years |
| Syeeda Siddiqui | Secretary | 9 Dec 2014 | 27 May 2016 | - | - |
| Tracy Amanda Pearce | Director | 22 Jun 2018 | 7 Jan 2021 | British | 53 years |
| Vivien Armson | Director | 6 Nov 2006 | 31 Mar 2010 | British | 68 years |