| Alexandre Bertrand Geoffroy | Director | 16 Apr 2020 | 28 Jun 2021 | French | 49 years |
| Andrew John Swanson | Director | 15 Jan 1996 | 13 Feb 2001 | British | 76 years |
| Andrew Stephen James Ramsay | Director | 13 Dec 2005 | 3 Feb 2011 | British | 65 years |
| Andrew Stephen James Ramsay | Secretary | 14 Jul 2000 | 3 Feb 2011 | British | - |
| Andrew Wilson Garner | Director | 31 Jan 2012 | 1 Jan 2016 | British | 64 years |
| Andrew Wilson Garner | Director | 1 Jan 2018 | 31 Dec 2021 | British | 64 years |
| Angel Alejandro Sanz Fernandez | Director | 1 Sept 2023 | 24 Jul 2024 | Spanish | 51 years |
| Catherine Mary Springett | Director | 29 Jan 1997 | 14 Jul 2000 | British | 69 years |
| Charlotte Katherine Mcguinness | Director | 1 Jan 2018 | 6 Nov 2019 | British | 53 years |
| Christophe Michel Ignace Marie Boullier De Branche | Director | 6 Nov 2019 | 3 Jan 2024 | French | 49 years |
| David George Alcock | Director | 1 Dec 2010 | 1 Jan 2018 | British | 61 years |
| David Whipple Crane | Director | 14 Jul 2000 | 30 Nov 2003 | American | 67 years |
| Gareth Neil Griffiths | Director | 20 Jun 2007 | 31 Jul 2012 | British | 57 years |
| Geert Herman August Peeters | Director | 15 May 2012 | 14 May 2013 | Belgian | 63 years |
| Graham Hunter Hadley | Director | 30 May 1992 | 16 Jan 1996 | British | 82 years |
| Granville Thomas Bateman Camsey | Director | 30 May 1992 | 31 Dec 1995 | British | 90 years |
| Hillary Sue Berger | Secretary | 31 Jan 2012 | 1 Jan 2016 | - | - |
| Hiromu Kayamori | Director | 15 Nov 2017 | 20 Dec 2017 | Japanese | 54 years |
| Isao Kajumura | Director | 8 Aug 2011 | 1 Jul 2015 | Japanese | 57 years |
| James Colin Eden Webster | Director | 30 May 1992 | 16 Jan 1996 | British | 90 years |
| Jason Anthony Keene | Secretary | 2 Nov 1998 | 14 Jul 2000 | British | - |
| John William Baker | Director | 30 May 1992 | 31 Aug 1997 | British | 89 years |
| Kenneth Wayne Robinson | Director | 6 Nov 2019 | 16 Apr 2020 | American | 64 years |
| Kennith John Oakley | Director | 13 Dec 2005 | 8 Aug 2007 | British | 64 years |
| Kevin Dibble | Director | 1 Jul 2021 | 31 Mar 2024 | British | 58 years |
| Mark David Williamson | Director | 5 Oct 2004 | 15 May 2012 | British | 69 years |
| Maxwell Glyn Herbert | Secretary | 30 May 1992 | 15 Jan 1996 | British | - |
| Olivier Bloeyaert | Director | 6 Nov 2019 | 10 Feb 2020 | Belgian | 47 years |
| Penelope Louise Chalmers | Director | 5 Oct 2004 | 23 Jan 2006 | British | 60 years |
| Philip Gotsall Cox | Director | 14 Jul 2000 | 6 Dec 2004 | British | 75 years |
| Pierre Jean Bernard Guiollot | Director | 14 May 2013 | 1 Jan 2016 | French | 58 years |
| Ro Okaniwa | Director | 16 Oct 2017 | 15 Nov 2017 | Japanese | 63 years |
| Roderick James Jackson | Director | 30 May 1992 | 31 Aug 1997 | British | 86 years |
| Roger Derek Simpson | Secretary | 3 Feb 2011 | 23 Jun 2014 | - | - |
| Sarah Jane Gregory | Secretary | 1 Jan 2016 | 16 Apr 2020 | - | - |
| Sarah Louise Smith | Director | 25 Mar 2010 | 31 Jan 2012 | British | 57 years |
| Shigeaki Ihara | Director | 1 Jul 2015 | 16 Oct 2017 | Japanese | 53 years |
| Simon David Pinnell | Director | 1 Jan 2016 | 10 Jan 2018 | British | 62 years |
| Simon Huw Bateman | Director | 31 Jul 2012 | 3 Oct 2025 | British | 60 years |
| Stanley Brian Birkenhead | Director | 30 May 1992 | 29 Jan 1997 | British | 85 years |
| Stephen Riley | Director | 26 Feb 2004 | 25 Mar 2010 | British | 65 years |
| Steven Drapper | Director | 25 Mar 2010 | 1 Dec 2010 | British | 64 years |
| Susan Diane Morgan | Secretary | 15 Jan 1996 | 2 Nov 1998 | British | - |
| Toru Takahashi | Director | 29 Apr 2008 | 8 Aug 2011 | Japanese | 59 years |
| Toshihiro Tate | Director | 20 Jun 2007 | 29 Apr 2008 | British | 73 years |
| Vincent Mary Verbeke | Director | 14 Feb 2020 | 31 Aug 2023 | Belgian | 50 years |