| Alasdair David Evans | Director | 17 Jun 2003 | 20 Sept 2010 | British | 65 years |
| Alastair Ross Goobey | Director | 9 Feb 1993 | 31 Dec 2001 | British | 81 years |
| Andrew David Strang | Director | 1 Sept 2009 | 3 Mar 2011 | British | 73 years |
| Andrew John Martin | Director | 31 Mar 1995 | 30 Jun 2006 | British | 80 years |
| Anthony Watson | Director | 16 Nov 1998 | 31 Jan 2006 | British | 81 years |
| Benjamin David Sanderson | Director | 18 Sept 2008 | 20 Dec 2021 | British | 56 years |
| Carl David Bennett | Director | 31 May 2006 | 30 Jan 2009 | British | 56 years |
| Charles Guy Rodney Leach | Director | 1 Apr 1994 | 31 Mar 1995 | British | 92 years |
| Christopher Philip Charles Mathew | Director | 27 Apr 2007 | 31 Oct 2019 | British | 56 years |
| Christopher Raymond Andrew Darroch | Director | 12 May 2010 | 5 May 2023 | British | 60 years |
| Corin Leonard Thoday | Director | 24 Apr 2009 | 19 Apr 2013 | British | 51 years |
| David John Price | Director | 4 Nov 2009 | 11 May 2023 | British | 66 years |
| David Leonard Grose | Director | 9 Sept 2015 | 31 Jan 2018 | British | 50 years |
| Emily Ann Mousley | Director | 17 Dec 2007 | 23 Jun 2016 | British | 58 years |
| Fiona Mary Sweeney | Director | 31 Mar 1995 | 7 Dec 2007 | Irish | 64 years |
| Frederick William Le Grice | Secretary | 1 Feb 1993 | 30 Nov 2001 | British | - |
| Ian Marshall Kennedy | Director | 31 May 2016 | 23 Oct 2024 | British | 63 years |
| Jonathan Robson | Director | 23 Nov 2006 | 15 Sept 2009 | British | 56 years |
| Keith Michael Bugden | Director | 20 Sept 2005 | 30 Oct 2009 | British | 68 years |
| Kenneth Rowland Thomas | Director | 1 Feb 1993 | 31 Mar 1995 | British | 99 years |
| Kirsty Ann-marie Wilman | Director | 27 Feb 2018 | 31 May 2024 | British | 46 years |
| Leslie Victor Hewitt | Director | 1 Feb 1993 | 31 Mar 1993 | British | 95 years |
| Lord Clarke | Director | 13 Apr 1993 | 31 Mar 1995 | British | 94 years |
| Mark Jonathon Anson | Director | 31 Jan 2006 | 31 Aug 2007 | American | 67 years |
| Mark Julian Gifford | Director | 26 Jun 2007 | 14 Mar 2008 | British | 63 years |
| Michelle Simone Green | Secretary | 30 Nov 2001 | 17 Jun 2004 | British | - |
| Neil Fleming Ross | Director | 25 Jun 2007 | 12 Jun 2009 | British | 73 years |
| Nicholas Charles William Mustoe | Director | 25 Feb 2002 | 31 May 2006 | British | 65 years |
| Philip Edward Sellers | Director | 1 Feb 1993 | 31 Mar 1994 | British | 89 years |
| Philip John Payton Nell | Director | 9 Sept 2015 | 29 Mar 2018 | British | 55 years |
| Quentin James Neilson Burgess | Director | 31 Mar 1995 | 31 Mar 2005 | British | 76 years |
| Richard Anthony Harrold | Director | 1 Feb 1993 | 20 Jan 2004 | British | 80 years |
| Richard Armand De Blaby | Director | 24 Mar 2006 | 1 Apr 2014 | British | 66 years |
| Robert Alan Padgett | Director | 1 Feb 1993 | 31 Mar 1995 | British | 83 years |
| Rupert James Clarke | Director | 20 Jan 2004 | 30 Jan 2012 | British | 68 years |
| Simon Robert Cunningham | Director | 1 Jul 2016 | 15 Dec 2023 | British | 48 years |
| Stephen Allen | Director | 2 Mar 2012 | 30 Sept 2015 | British | 65 years |
| Steven Paul Grahame | Director | 24 Apr 2009 | 26 Jan 2010 | British | 57 years |
| Timothy William John Turnbull | Director | 20 Dec 2005 | 31 Mar 2011 | British | 56 years |