| Alexander Park Leitch | Director | 27 Apr 2010 | 29 Feb 2012 | British | 78 years |
| Andrea Margaret Blance | Director | 17 Jul 2015 | 14 Aug 2020 | British | 61 years |
| Andrew Mark Parsons | Director | 9 Nov 2012 | 1 Sept 2016 | British | 60 years |
| Andrew Michael Peck | Director | 24 Jan 2008 | 31 May 2013 | British | 76 years |
| Anthony Jonathan Reizenstein | Director | 23 Apr 2021 | 30 Jun 2024 | British | 69 years |
| Antonio Lorenzo | Director | 2 Mar 2016 | 30 May 2023 | Spanish | 59 years |
| Archibald Gerard Kane | Director | 4 Mar 2009 | 19 May 2011 | British | 73 years |
| Brian Gammell Ivory | Director | 31 Jan 2002 | 30 Sept 2003 | British | 76 years |
| Brian James Duffin | Director | 24 Jan 2008 | 18 Mar 2010 | British | 70 years |
| Catriona Margaret Herd | Secretary | 25 Mar 2010 | 23 Apr 2014 | British | - |
| Cornelis Antonius Carolus Maria Schrauwers | Director | 14 May 2012 | 18 Nov 2014 | Dutch | 78 years |
| Craig James Thornton | Director | 1 Jun 2013 | 7 Nov 2016 | British | 53 years |
| David James Stanley Oldfield | Director | 18 Jul 2014 | 30 Jun 2015 | British | 63 years |
| David James Walkden | Director | 1 Jan 2012 | 1 Jun 2013 | British | 67 years |
| David Spencer Boyle | Director | 26 Jan 2001 | 30 Sept 2003 | British | 83 years |
| Deborah Lee Davis | Director | 18 Mar 2022 | 18 Mar 2025 | British | 62 years |
| Douglas Ferrans | Director | 31 Jan 2002 | 30 Sept 2003 | British | 71 years |
| Douglas Martin Claisse | Director | 1 Jan 1997 | 23 Apr 1997 | British | 91 years |
| Duncan George Robin Ferguson | Director | 14 Jul 2003 | 31 Dec 2007 | British | 83 years |
| Gillian Elizabeth Camm | Director | 20 Jan 1998 | 31 May 2001 | British | 66 years |
| Gregor Ninian Stewart | Director | 15 Dec 2011 | 5 Oct 2012 | British | 61 years |
| Howard Julian Briggs | Secretary | 2 May 1996 | 1 Jan 1997 | British | - |
| Howard Michael Posner | Director | 31 Jan 2002 | 30 Sept 2003 | British | 69 years |
| Jakob Pfaudler | Director | 5 Nov 2018 | 18 Dec 2019 | Austrian | 53 years |
| James Christopher Steuart Hillman | Director | 10 Dec 2019 | 31 Aug 2023 | British | 56 years |
| James Robert Crosby | Director | 2 May 1996 | 17 Dec 2001 | British | 69 years |
| Jane Elizabeth Mary Curtis | Director | 11 Nov 2014 | 7 Oct 2022 | British | 65 years |
| Jeffrey Michael Blackburn | Director | 2 May 1996 | 1 Jan 1997 | British | 84 years |
| Jeremy Goford | Director | 27 Apr 2010 | 13 Feb 2015 | British | 80 years |
| Jesujuwonlo Williams | Secretary | 29 Mar 2024 | 12 Sept 2024 | - | - |
| Joanna Kate Harris | Director | 29 Sept 2023 | 4 Jun 2025 | British | 52 years |
| Joanne Dawson | Director | 1 Mar 2006 | 23 Mar 2009 | British | 63 years |
| Joanne Margaret Jolly | Secretary | 23 Apr 2014 | 28 Mar 2024 | - | - |
| John Austin Hungerford Leigh Hoskyns | Director | 1 Jan 1997 | 23 Apr 1998 | British | 98 years |
| John Francis Hylands | Director | 19 Mar 2015 | 31 Mar 2021 | British | 74 years |
| John Lockhart Wood | Director | 1 Jan 1997 | 27 Apr 2000 | British | 90 years |
| John Neil Maclean | Director | 31 Jan 2002 | 24 Mar 2005 | British | 81 years |
| John Patrick Hiew | Director | 1 Oct 2003 | 28 Sept 2005 | British | 61 years |
| John Russell Rees | Director | 1 Jan 1997 | 23 Apr 1998 | British | 97 years |
| John Spellman | Director | 10 Nov 2005 | 8 Sept 2006 | British | 59 years |
| John Stephen Edwards | Director | 20 Jan 1998 | 26 Apr 2006 | British | 70 years |
| John Van Der Wielen | Director | 4 Mar 2009 | 25 Mar 2010 | Australian | 59 years |
| Jonathan Scott Wheway | Director | 1 Aug 2022 | 31 Oct 2025 | British | 59 years |
| Jonathon Roderick Alan Bond | Director | 24 Jul 2019 | 14 May 2021 | British | 62 years |
| Karin Alexandra Cook | Director | 19 Oct 2015 | 22 Jun 2018 | British | 59 years |
| Kate Cheetham | Director | 27 Sept 2018 | 9 Sept 2021 | British | 62 years |
| Kathleen Anne Nealon | Director | 24 Mar 2005 | 31 Dec 2007 | American | 72 years |
| Keith William Abercromby | Director | 31 Jan 2002 | 17 Oct 2005 | British | 61 years |
| Kerr Luscombe | Director | 6 Apr 2010 | 25 May 2011 | British | 60 years |
| Lord (norman Roy) Blackwell | Director | 1 Sept 2012 | 23 Jun 2014 | British | 73 years |
| Malachy Paul Smith | Director | 1 Apr 1998 | 17 Dec 2001 | Irish | 77 years |
| Malachy Paul Smith | Director | 14 Oct 2005 | 31 Dec 2007 | Irish | 77 years |
| Malcolm Argent | Director | 1 Jan 1997 | 17 Dec 2001 | British | 90 years |
| Mark Andrew Fisher | Director | 19 Sept 2012 | 22 Apr 2014 | British | 65 years |
| Mark George Culmer | Director | 31 Oct 2012 | 1 Aug 2019 | British | 63 years |
| Michael Christophers | Director | 6 Oct 2005 | 15 May 2017 | British | 83 years |
| Michael Harris | Director | 1 Sept 2016 | 5 Dec 2019 | British | 60 years |
| Michael Rodney Newton Moore | Director | 1 Jan 1997 | 31 Dec 2007 | British | 89 years |
| Michael Ronald Downie | Director | 1 Sept 2023 | 15 Jan 2024 | British | 49 years |
| Michael Stuart Robinson | Director | 1 Oct 2003 | 30 Jun 2006 | British | 61 years |
| Nicholas Edward Tucker Prettejohn | Director | 23 Jun 2014 | 30 Sept 2021 | British | 65 years |
| Norval Mackenzie Bryson | Director | 27 Apr 2010 | 31 Jul 2015 | British | 76 years |
| Patrick Nigel Christopher Gale | Director | 24 Jan 2008 | 31 Dec 2009 | British | 65 years |
| Paul Gerard Mcnamara | Director | 30 Nov 2005 | 30 Jun 2007 | Irish | 59 years |
| Paul Russell Moore | Director | 15 Aug 2002 | 30 Sept 2003 | United Kingdom | 67 years |
| Peter John Veale | Secretary | 4 Aug 2000 | 23 Mar 2009 | British | - |
| Peter Louis Michael Sherwood | Director | 1 Jan 1997 | 31 Dec 2004 | British | 84 years |
| Phil Andrew Hodkinson | Director | 17 Dec 2001 | 28 Jul 2005 | British | 67 years |
| Philip Duncan Loney | Director | 25 Mar 2010 | 27 Sept 2011 | British | 61 years |
| Ralph Nicholas Quartano | Director | 1 Jan 1997 | 23 Apr 1998 | British Greek | 98 years |
| Raymond John Hildreth Milne | Director | 1 Oct 2003 | 30 Jun 2007 | British | 66 years |
| Richard Leslie Martin Wohanka | Director | 1 Jun 2013 | 18 Oct 2018 | British | 73 years |
| Robert Alan Devey | Director | 18 Oct 2005 | 1 Jun 2006 | British | 57 years |
| Robert Alan Devey | Director | 10 Oct 2006 | 23 Mar 2009 | British | 57 years |
| Robert James Mackenzie Bulloch | Director | 1 Jan 2012 | 31 Dec 2012 | British | 64 years |
| Robert Philippe Walther | Director | 1 Jan 1997 | 9 Oct 2001 | British | 82 years |
| Roland Gordon Ward | Director | 1 Jan 1997 | 27 Mar 2003 | British | 80 years |
| Rosemary Harris | Director | 25 Aug 2011 | 29 Feb 2012 | British | 67 years |
| Sally Mayer | Secretary | 23 Mar 2009 | 25 Mar 2010 | Other | - |
| Sophie Jane O'connor | Director | 1 Jun 2017 | 30 Sept 2023 | British | 55 years |
| Steven James Colsell | Director | 17 Aug 2006 | 23 Mar 2009 | British | 61 years |
| Susan Annabel Margaret Fogarty | Secretary | 1 Jan 1997 | 4 Aug 2000 | British | - |
| Thomas Woolgrove | Director | 1 Jun 2006 | 30 Jun 2007 | British | 55 years |
| Toby Emil Strauss | Director | 17 Oct 2011 | 21 Oct 2015 | British | 66 years |
| Trevor Anthony Leonard | Director | 25 Nov 2005 | 5 Apr 2010 | United Kingdom | 66 years |
| Vimlesh Maru | Director | 18 Jun 2013 | 14 Sept 2017 | British | 53 years |
| William Anthony Beadle | Director | 27 Oct 2005 | 17 Aug 2006 | British | 76 years |