| Alan Paul Busson | Secretary | 5 Dec 2005 | 28 Sept 2006 | British | - |
| Alasdair Christopher Gillies | Director | 4 Apr 2003 | 23 Jun 2008 | British | 68 years |
| Alexander Park Leitch | Director | 31 Aug 2000 | 21 Dec 2000 | British | 79 years |
| Alfred Michael Heath | Director | 1 May 1992 | 31 Jul 1993 | British | 90 years |
| Andrew John Wainwright-brown | Secretary | 22 Sept 1993 | 7 Jun 1994 | British | - |
| Andrew Stephen Melcher | Director | 1 May 1992 | 15 Oct 1997 | U S | 77 years |
| Ann Claire Blundell | Secretary | 27 Jun 2012 | 20 Feb 2014 | British | - |
| Anne Torry | Director | 1 Jul 2016 | 4 May 2017 | British | 61 years |
| Anthony John Russell | Director | 1 May 1992 | 30 Apr 1998 | British | 84 years |
| Anthony Paul Kenmir | Director | 24 Nov 2009 | 23 Jun 2011 | British | 70 years |
| Antoine James Philippe Michel Meyer | Director | 18 Nov 1992 | 3 Feb 2000 | French | 79 years |
| Brian Michael Thomas | Director | 1 Oct 1997 | 19 Nov 2001 | British | 74 years |
| Christopher John Willett | Director | 31 Aug 2000 | 12 Feb 2001 | British | 79 years |
| Christopher Keogh | Director | 5 Sept 2000 | 7 Jun 2001 | British | 67 years |
| Christopher Stuart Fairclough | Director | 22 Jun 2011 | 30 Jun 2022 | British | 76 years |
| Christopher Walter Laidlaw | Director | 24 May 1996 | 31 May 2000 | British | 74 years |
| Clive Frederick Coates | Director | 24 May 1996 | 31 Dec 1997 | British | 82 years |
| Colin Edward Parker | Director | 1 May 1992 | 20 Apr 1995 | British | 91 years |
| Corina Katherine Ross | Secretary | 17 Oct 2008 | 25 Jul 2013 | British | - |
| David Arthur Lancaster | Secretary | 1 May 1992 | 22 Sept 1993 | British | - |
| David John Etherington | Director | 24 Sept 2003 | 31 Aug 2012 | British | 69 years |
| David Perrott Sims | Director | 11 Jun 1998 | 11 Aug 2000 | British | 68 years |
| David Perrott Sims | Director | 4 Apr 2003 | 1 Oct 2009 | British | 68 years |
| David Perrott Sims | Director | 1 Sept 2011 | 1 Jan 2015 | British | 68 years |
| David Ross Carrie | Director | 11 Jun 1998 | 7 Jun 2001 | United Kingdom | 62 years |
| David Ross Carrie | Director | 4 Apr 2003 | 31 Dec 2005 | United Kingdom | 62 years |
| David Stanley Hall | Director | 18 Nov 1992 | 13 Apr 1995 | British | 84 years |
| Gary Paul John Shaughnessy | Director | 7 Jun 2012 | 31 Dec 2020 | British | 60 years |
| Helen Alison Pickford | Director | 18 Mar 2020 | 25 Sept 2025 | British | 55 years |
| Ian Bruce Owen | Director | 1 May 1992 | 21 Aug 2000 | British | 73 years |
| Ian Charles Robert Stuart | Director | 22 Jun 2011 | 31 May 2020 | Irish | 78 years |
| Ian Ritchie | Secretary | 16 May 2013 | 20 Feb 2014 | - | - |
| Inga Kristine Beale | Director | 17 Nov 2009 | 23 Jun 2011 | British | 63 years |
| James Anthony Wiltshire | Secretary | 15 May 1996 | 31 Dec 1998 | British | - |
| James Barrington Quin | Director | 17 Jun 2016 | 24 May 2017 | British | 57 years |
| James Kingsley Reeve | Director | 11 Jun 1998 | 31 Mar 2004 | British | 69 years |
| James Richard Sykes | Director | 21 Oct 2005 | 24 Nov 2009 | British | 65 years |
| James Richard Sykes | Director | 15 Nov 2012 | 6 Feb 2020 | British | 65 years |
| James Thomas Gaunt Butler | Director | 22 Jun 2011 | 30 Jun 2019 | British | 80 years |
| Jayne Michelle Meacham | Secretary | 22 Nov 2006 | 2 May 2008 | British | - |
| Jeremy Ward Grayburn | Director | 15 Sept 2000 | 6 Apr 2001 | British | 74 years |
| John Antony Cacchioli | Director | 11 Aug 2000 | 7 Jun 2001 | British | 68 years |
| John Peter Jewitt | Director | 21 Sept 2000 | 6 Jun 2001 | British | 72 years |
| Julian Temes | Director | 1 Jan 2021 | 22 Jan 2025 | Spanish | 54 years |
| Karen Gale | Secretary | 20 Dec 2013 | 20 Feb 2014 | - | - |
| Keith Reginald Baldwin | Director | 24 Oct 2001 | 31 Aug 2003 | British | 78 years |
| Lawrence Churchill | Director | 5 Dec 2002 | 24 Jun 2004 | British | 80 years |
| Lily Olisa Holding | Secretary | 24 Jun 2004 | 14 Apr 2005 | British | - |
| Malcolm Denys Comfort | Secretary | 27 Jun 1994 | 15 May 1996 | British | - |
| Marianne Fitzjohn | Director | 4 Apr 2003 | 23 Oct 2003 | Danish | 60 years |
| Mario Greco | Director | 10 Jan 2008 | 29 Jun 2010 | Italian | 67 years |
| Mark Christopher Chessher | Director | 14 Jun 2005 | 1 Nov 2006 | British | 66 years |
| Mark Patrick Hartigan | Director | 9 Apr 2015 | 8 Dec 2015 | British | 63 years |
| Martin David Moule | Director | 24 Sept 2003 | 25 Apr 2005 | British | 71 years |
| Martin Lindsay Bride | Director | 26 Jan 2006 | 24 Apr 2009 | British | 63 years |
| Michael Andrew Ferns | Director | 4 Apr 2003 | 3 Aug 2004 | British | 62 years |
| Michael Joseph Brennan | Director | 1 Oct 2009 | 31 Aug 2011 | British Irish | 74 years |
| Michael Koller | Director | 9 Nov 2020 | 10 Sept 2021 | Swiss | 62 years |
| Nicolas Anthony Burnet | Director | 28 Feb 2012 | 25 Feb 2016 | American | 58 years |
| Nigel Lowe | Secretary | 14 Apr 2005 | 30 Jun 2013 | British | - |
| Oscar Clemente Tengtio | Director | 1 May 2009 | 23 Jun 2011 | American | 70 years |
| Paulus Van De Geijn | Director | 24 Jun 2004 | 10 Apr 2008 | Dutch | 80 years |
| Peter Andreas Goerke | Director | 9 Oct 2009 | 12 Jan 2011 | Swiss | 64 years |
| Peter Charles Campbell | Director | 11 Jun 1998 | 11 Jan 2000 | British | 68 years |
| Peter Charles Campbell | Director | 11 Aug 2000 | 11 Jun 2001 | British | 68 years |
| Peter Charles Howe | Secretary | 31 Dec 1998 | 24 Jun 2004 | British | - |
| Phil Andrew Hodkinson | Director | 11 Jun 1998 | 15 Nov 2000 | British | 68 years |
| Philip Smith | Director | 15 Oct 1997 | 12 Oct 1998 | British | 79 years |
| Raymond Greenshields | Director | 21 Dec 2000 | 14 Oct 2002 | Australian | 79 years |
| Robert Frederick Hubbard | Director | 1 May 1992 | 31 Jan 1995 | British | 86 years |
| Rodney Malcolm Cook | Director | 18 Sept 2001 | 14 Oct 2002 | British/australian | 69 years |
| Roger Charles Townsend | Director | 1 May 1992 | 1 Jun 1995 | British | 78 years |
| Shayne Paul Deighton | Director | 3 Aug 1998 | 20 Dec 2000 | British | 67 years |
| Steven James Colsell | Director | 1 Feb 2001 | 3 Aug 2004 | British | 62 years |
| Thomas Mchardy Naskret | Director | 1 Jan 1997 | 22 May 1998 | British | 74 years |
| Timothy James Bailey | Director | 1 Jan 2021 | 1 Jan 2021 | British | 52 years |
| Timothy James Bailey | Director | 15 Jan 2021 | 1 Apr 2025 | British | 52 years |
| Tulsi Ratakonda Naidu | Director | 24 May 2017 | 31 Dec 2020 | British | 53 years |
| Vincent John Jerrard | Director | 11 Aug 2000 | 4 Apr 2003 | British | 71 years |