| Adrian Roger Wyatt | Director | 3 Mar 1993 | 25 May 2012 | British | 77 years |
| Angus Alexander Dodd | Director | 25 Sept 2015 | 7 Nov 2019 | British | 58 years |
| Barbara Thomas | Director | 3 Mar 2000 | 26 Nov 2008 | American | 79 years |
| Brian Jack Mitchell | Director | 3 Mar 1993 | 6 Aug 1997 | British | 90 years |
| Charles William Cayzer | Director | 20 Jan 2010 | 25 Sept 2015 | British | 68 years |
| Charlotte Ind Eastwood | Secretary | 23 Jul 2002 | 25 Oct 2004 | British | - |
| Christopher Bell | Director | 17 Sept 2010 | 25 Sept 2015 | British | 68 years |
| Christopher Hamilton Armon-jones | Director | 12 Nov 1996 | 11 Apr 2000 | British | 76 years |
| Christopher John Barry Walls | Director | 3 Mar 1993 | 5 Jun 1997 | British | 77 years |
| Christopher John Barry Walls | Secretary | 3 Mar 1993 | 18 Aug 1995 | British | - |
| David Geoffrey Pangbourne | Director | 23 Aug 2001 | 7 Sept 2010 | British | 85 years |
| David Jeffrey Kirkpatrick | Director | 12 Nov 1996 | 31 Oct 1999 | British | 84 years |
| David Nicholas Gavaghan | Director | 10 May 2010 | 16 Feb 2012 | British | 66 years |
| Dean Minter | Director | 26 Jan 2022 | 29 Aug 2024 | British | 46 years |
| Donald John Quintin | Director | 17 Oct 2018 | 23 Sept 2021 | American | 53 years |
| Edward Stratford Dugdale | Director | 25 Mar 1996 | 7 Oct 2002 | British | 66 years |
| Gail Robson Skeete | Secretary | 18 Oct 1999 | 30 May 2000 | British | - |
| George Evagelos Kountouris | Director | 8 Dec 2017 | 14 Nov 2019 | British | 71 years |
| Greg Spezzano | Director | 26 Nov 2019 | 29 Aug 2024 | American | 61 years |
| James Hendry Riddell | Director | 25 Sept 2015 | 29 Aug 2024 | British | 46 years |
| James Robert Hamilton Stubber | Director | 7 Oct 2002 | 2 Feb 2006 | British | 71 years |
| Jan-christoph Dietrich Duedden | Director | 8 Sept 2021 | 26 Jan 2022 | German | 48 years |
| Jerome Foulon | Director | 3 Oct 2018 | 29 Aug 2024 | Canadian,french | 51 years |
| Joan Macnaughton | Director | 26 Jan 2004 | 31 Jan 2010 | British | 75 years |
| John Bryan Evans | Director | 3 Mar 1993 | 24 Apr 2002 | British | 91 years |
| John Ryan Herbert | Director | 25 Sept 2015 | 15 Mar 2023 | American | 69 years |
| Martin Richard Meech | Director | 4 Jul 2000 | 22 Jul 2013 | British | 68 years |
| Maxwell David Shaw James | Director | 5 Jul 2011 | 27 Jun 2016 | British | 58 years |
| Michael Ben Jenkins | Director | 11 Jun 2019 | 25 Feb 2020 | British | 53 years |
| Michael Edward Riley | Director | 13 Aug 2001 | 23 Jul 2002 | British | 65 years |
| Nicholas Simon Keith Shattock | Director | 14 Jun 1995 | 24 Mar 2011 | British | 66 years |
| Nicholas Simon Keith Shattock | Secretary | 18 Aug 1995 | 6 May 1997 | British | - |
| Nigel George Ellis | Director | 8 Nov 1995 | 4 Sept 2007 | British | 86 years |
| Nigel Justin Kempner | Director | 25 May 2012 | 19 Jul 2016 | British | 69 years |
| Ofer Yardeni | Director | 25 Nov 2019 | 15 Mar 2023 | American | 65 years |
| Olivier Vincent Daniel Brahin | Director | 25 Sept 2015 | 11 Sept 2020 | French | 59 years |
| Pamela Elizabeth Alexander | Director | 22 Jul 2003 | 28 Nov 2003 | British | 71 years |
| Paul Hughes | Secretary | 6 May 1997 | 31 Jan 2000 | British | - |
| Peter John Bellett Dixon | Director | 20 Jan 2010 | 25 Sept 2015 | British | 80 years |
| Philippe Couturier | Director | 5 Oct 2016 | 2 Oct 2018 | French | 59 years |
| Rebecca Jane Worthington | Director | 24 Jul 2001 | 24 Sept 2012 | British | 54 years |
| Rebecca Jane Worthington | Secretary | 9 Dec 1998 | 23 Jul 2002 | British | - |
| Richard Arthur Barfield | Director | 18 Feb 1997 | 4 Jul 2000 | British | 78 years |
| Richard James Stearn | Director | 24 Jul 2012 | 3 Apr 2015 | British | 57 years |
| Robert John Calnan | Director | 25 Sept 2015 | 8 Dec 2017 | British | 68 years |
| Rosaleen Clare Kerslake | Director | 1 Jul 2013 | 25 Sept 2015 | British | 68 years |
| Sandra Judith Odell | Secretary | 1 Jan 2013 | 5 Oct 2016 | - | - |
| Simon Geoffrey Carter | Director | 26 May 2015 | 13 Jan 2017 | British | 50 years |
| Simon Timothy Laffin | Director | 1 Feb 2008 | 20 Jul 2015 | British | 66 years |
| Susan Elizabeth Dixon | Secretary | 25 Oct 2004 | 31 Dec 2012 | British | - |
| Timothy Paul Beaulac | Director | 25 Nov 2019 | 23 Sept 2021 | American | 70 years |
| Tom Cross Brown | Director | 27 May 2005 | 5 Sept 2006 | English | 78 years |
| Tonianne Dwyer | Director | 30 Nov 2006 | 16 Apr 2010 | Australian | 63 years |
| William John Rucker | Director | 1 Oct 2009 | 25 Sept 2015 | British | 62 years |
| William John Turner Plender | Director | 23 Jul 2002 | 31 Mar 2010 | British | 80 years |