| Adrian Harold Michael White | Director | 24 Oct 2003 | 23 Jul 2004 | British | 81 years |
| Alastair Ross Goobey | Director | 17 Feb 1999 | 31 Dec 2001 | British | 81 years |
| Amanda Caffin-robbins | Secretary | 31 Mar 2005 | 21 Jul 2006 | Australia | - |
| Andrew David Dewhirst | Director | 24 Oct 2003 | 6 Jan 2006 | British | 66 years |
| Angela Abena Roberts | Director | 12 Sept 2005 | 23 Jul 2007 | American | 57 years |
| David William Burrowes | Director | 6 Jan 2006 | 31 Jan 2008 | British | 61 years |
| Giuseppe Osso | Director | 8 Aug 2007 | 20 Jun 2008 | Italian | 54 years |
| Katherine Thompson | Director | 29 Jan 2021 | 31 May 2022 | British | 60 years |
| Lucy Sarah Paterson Millar | Director | 4 Sept 2006 | 22 May 2014 | British | 52 years |
| Maurice Gerard Quirke | Director | 3 Aug 2004 | 14 Dec 2007 | British | 66 years |
| Michelle Simone Green | Director | 24 Oct 2003 | 7 Aug 2015 | British | 59 years |
| Michelle Simone Green | Secretary | 17 Feb 1999 | 31 Mar 2005 | British | - |
| Michelle Simone Green | Secretary | 21 Jul 2006 | 8 Aug 2007 | British | - |
| Peter Robert Butler | Director | 22 Oct 2002 | 24 Oct 2003 | British | 77 years |
| Rachel Amos | Director | 19 Apr 2004 | 1 Sept 2005 | British And American | 56 years |
| Robert Augustus Gardner Monks | Director | 27 Feb 1999 | 22 Oct 2002 | American | 93 years |
| Simon Robert Cunningham | Director | 10 May 2019 | 15 Dec 2023 | British | 48 years |
| Stephen Allen | Director | 6 Jan 2006 | 15 Dec 2009 | British | 65 years |
| Stephen Dunkling | Director | 1 Oct 2009 | 19 Sept 2011 | British | 62 years |
| Susan Jane Cane | Director | 22 Sept 2009 | 10 May 2019 | British | 68 years |
| Susan Jane Cane | Secretary | 8 Aug 2007 | 22 Sept 2009 | British | - |
| Victoria Louise Streater | Secretary | 22 Sept 2009 | 22 Dec 2011 | British | - |