| Alasdair Bruce Lenman | Director | 3 Jan 2006 | 31 Mar 2010 | British | 56 years |
| Andrea Margaret Blance | Director | 17 Jul 2015 | 14 Aug 2020 | British | 61 years |
| Andrew David Briggs | Director | 20 Apr 2010 | 20 May 2011 | British | 59 years |
| Andrew John Smyth | Director | 16 Jun 2000 | 18 Jul 2003 | British | 59 years |
| Andrew Mark Parsons | Director | 9 Nov 2012 | 1 Sept 2016 | British | 60 years |
| Andrew Michael Peck | Director | 24 Jan 2012 | 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 | 2 Feb 1993 | 24 Oct 1994 | British | 73 years |
| Archibald Gerard Kane | Director | 1 Oct 2003 | 20 May 2011 | British | 73 years |
| Barbara Ann Reilly | Director | 15 Sept 1994 | 1 Apr 1996 | British | 71 years |
| Bruce Alistair James Mcdowell | Director | 2 Feb 1993 | 31 May 1993 | British | 89 years |
| Catriona Margaret Herd | Secretary | 23 May 2013 | 23 Apr 2014 | - | - |
| Christopher Anthony Ham | Director | 22 Feb 2005 | 30 Apr 2010 | British | 69 years |
| 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 Antony John Stoddard | Director | 18 May 2007 | 30 Jun 2010 | British | 52 years |
| David James Stanley Oldfield | Director | 18 Jul 2014 | 30 Jun 2015 | British | 63 years |
| David James Walkden | Director | 24 Jan 2012 | 1 Jun 2013 | British | 67 years |
| Deborah Lee Davis | Director | 18 Mar 2022 | 18 Mar 2025 | British | 62 years |
| Dennis Holt | Director | 18 Jul 1996 | 7 Feb 2000 | British | 77 years |
| Frederick John Randall | Director | 2 Feb 1993 | 1 Apr 1996 | British | 84 years |
| Graham Staples | Secretary | 12 Nov 1993 | 9 May 1994 | British | - |
| Graham Winston Fillery | Director | 7 Feb 2000 | 7 Feb 2003 | British | 62 years |
| Gregor Ninian Stewart | Director | 1 Jan 2012 | 5 Oct 2012 | British | 61 years |
| Helen Suzanne Rodgers | Secretary | 18 Jul 1996 | 11 Oct 2001 | British | - |
| Ian Charles Robert Stuart | Director | 16 Mar 2011 | 31 Dec 2011 | Irish | 77 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 |
| Jane Elizabeth Mary Curtis | Director | 11 Nov 2014 | 7 Oct 2022 | British | 65 years |
| Janet Anne Green | Director | 7 Feb 2003 | 31 Dec 2005 | British | 71 years |
| Jayne Michelle Meacham | Secretary | 31 Mar 2010 | 2 Feb 2011 | - | - |
| Jeremy Goford | Director | 24 Jan 2012 | 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 Margaret Jolly | Secretary | 23 Apr 2014 | 28 Mar 2024 | - | - |
| John Francis Hylands | Director | 19 Mar 2015 | 31 Mar 2021 | British | 74 years |
| John Keith Taylor | Secretary | 12 May 1994 | 18 May 1995 | British | - |
| John Kenneth Elbourne | Director | 2 Feb 1993 | 4 Jul 1996 | British | 81 years |
| Jonathan Charles Pain | Director | 7 Feb 2000 | 30 Apr 2003 | British | 68 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 |
| Keith George Gibbs | Director | 18 Nov 1997 | 16 Jun 2000 | British | 67 years |
| Keith Jones | Director | 12 Nov 1993 | 1 Jun 1997 | British | 67 years |
| Keith Martyn Moyle | Director | 2 Feb 1993 | 15 Jan 1996 | British | 72 years |
| Kevin Philip Cracknell | Director | 24 Oct 2011 | 31 Jul 2012 | British | 60 years |
| Lindsay Karen Forster | Director | 15 May 2009 | 31 Dec 2011 | British | 51 years |
| Lord (norman Roy) Blackwell | Director | 1 Sept 2012 | 23 Jun 2014 | British | 73 years |
| Luke Henry Walter March | Secretary | 2 Feb 1993 | 12 Nov 1993 | British | - |
| 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 |
| Martyn Paul Green | Director | 22 Oct 2003 | 15 May 2009 | British | 56 years |
| Mervyn Kay Pedelty | Director | 2 Feb 1993 | 30 Jun 1994 | British | 76 years |
| Michael Canniffe | Director | 9 Nov 2007 | 31 Dec 2011 | British | 62 years |
| Michael Christophers | Director | 24 Jan 2011 | 15 May 2017 | British | 83 years |
| Michael David Ross | Director | 6 Mar 2000 | 30 Sept 2003 | British | 79 years |
| Michael Frederick Mitchell | Director | 16 Jun 2000 | 31 Dec 2003 | British | 72 years |
| Michael Harris | Director | 1 Sept 2016 | 5 Dec 2019 | British | 60 years |
| Michael John Sommers | Director | 2 Feb 1993 | 31 Oct 1993 | British | 76 years |
| Michael Ronald Downie | Director | 1 Sept 2023 | 15 Jan 2024 | British | 49 years |
| Neal Leonard Jones | Director | 1 Aug 2001 | 12 Sept 2003 | British | 64 years |
| Neil Edward Galjaard | Director | 1 Mar 2004 | 21 Apr 2007 | British | 59 years |
| Nicholas Edward Tucker Prettejohn | Director | 23 Jun 2014 | 30 Sept 2021 | British | 65 years |
| Norval Mackenzie Bryson | Director | 24 Jan 2012 | 31 Jul 2015 | British | 76 years |
| Paul Patrick Brown | Director | 18 Jul 1996 | 4 Feb 1997 | British | 78 years |
| Paula Watts | Secretary | 20 May 2011 | 14 Jul 2011 | - | - |
| Peter George Edwin Ayliffe | Director | 1 Feb 1994 | 18 Jul 1996 | British | 72 years |
| Peter John Hubbard | Director | 23 May 1997 | 7 Feb 2000 | British | 70 years |
| Peter Robert Langston | Director | 14 May 2001 | 31 Jul 2001 | British | 79 years |
| Philip Duncan Loney | Director | 1 Sept 2003 | 31 Mar 2010 | British | 61 years |
| Raymond Gordon Tasker | Director | 7 Feb 2000 | 31 Jan 2005 | British | 73 years |
| Richard Labassee Beaven | Director | 2 Feb 2011 | 31 Dec 2011 | English | 64 years |
| Richard Leslie Martin Wohanka | Director | 1 Jun 2013 | 18 Oct 2018 | British | 73 years |
| Robert James Mackenzie Bulloch | Director | 20 May 2011 | 31 Dec 2012 | British | 64 years |
| Roger David Wood | Director | 17 Nov 1994 | 1 Apr 1996 | British | 78 years |
| Roger Quentin Phillips | Secretary | 18 May 1995 | 18 Jul 1996 | British | - |
| Rosemary Harris | Director | 20 May 2011 | 29 Feb 2012 | British | 67 years |
| Rudi Annie Maurice Van Delm | Director | 15 May 2009 | 14 Oct 2011 | Belgian | 61 years |
| Sally Ann Jones-evans | Director | 16 Jun 2000 | 31 Aug 2002 | British | 59 years |
| Sally Mayer | Secretary | 15 May 2009 | 31 Mar 2010 | Other | - |
| Sally Mayer | Secretary | 2 Feb 2011 | 20 May 2011 | - | - |
| Sally Mayer | Secretary | 14 Jul 2011 | 23 May 2013 | - | - |
| Sharon Noelle Slattery | Secretary | 11 Oct 2001 | 15 May 2009 | Irish | - |
| Simon James Hargreaves | Director | 7 Jun 2004 | 7 Dec 2007 | British | 59 years |
| Simon Peter Furnell | Director | 20 Sept 2002 | 16 Mar 2007 | British | 66 years |
| Sophie Jane O'connor | Director | 1 Jun 2017 | 30 Sept 2023 | British | 55 years |
| Stephen Andrew Maran | Director | 26 Feb 1997 | 31 Dec 1999 | British | 85 years |
| Stephen James Hughes | Director | 2 Oct 2008 | 11 Oct 2011 | British | 53 years |
| Steven Ernest Brown | Director | 18 Jul 1996 | 4 Nov 1997 | British | 72 years |
| Toby Emil Strauss | Director | 17 Oct 2011 | 21 Oct 2015 | British | 66 years |
| Vimlesh Maru | Director | 18 Jun 2013 | 14 Sept 2017 | British | 53 years |