| HOPKINSON, Christopher Neil, Mr. ACTIVE | Director | 07 Jul 2015 | | England | February 1969 | Millennium House, 65 Walton Street, Aylesbury, HP21 7QG, England |
| INGRAHAM, Kathryn Delaine ACTIVE | Director | 11 Sep 2025 | | United States | November 1968 | Millennium House, 65 Walton Street, Aylesbury, HP21 7QG, England |
| O’CONNOR, Deborah A. ACTIVE | Director | 01 Aug 2022 | | United States | September 1962 | Acco Brands, Four Corporate Drive, Lake Zurich, 60047, United States |
| SPIJKERVET, Ard Jen ACTIVE | Director | 01 Jan 2026 | | Netherlands | December 1967 | Millennium House, 65 Walton Street, Aylesbury, HP21 7QG, England |
| CHAPMAN, Paul Guy RESIGNED | Secretary | 10 Aug 2005 | 16 Aug 2005 | | | 51 Tempest Mead, North Weald, Epping, Essex, CM16 6DY |
| GEDDIE, Richard Mark RESIGNED | Secretary | 16 Aug 2005 | 23 Sep 2019 | | | 15 Pine Grove, Bricket Wood, St. Albans, Hertfordshire, AL2 3ST |
| PRIOR, Katherine Alexandra RESIGNED | Secretary | 23 Sep 2019 | 17 Jan 2022 | | | Oxford House, Oxford Road, Aylesbury, Buckinghamshire, HP21 8SZ |
| CHAPMAN, Paul Guy RESIGNED | Director | 10 Aug 2005 | 02 May 2006 | England | June 1965 | 51 Tempest Mead, North Weald, Epping, Essex, CM16 6DY |
| DAVIES, Emma Susan RESIGNED | Director | 30 Jan 2008 | 20 Apr 2011 | United Kingdom | December 1971 | Lawn Hill Cottage, Claydon, Oxfordshire, OX17 1ET |
| FENWICK, Neal Vernon RESIGNED | Director | 10 Aug 2005 | 01 Aug 2022 | | May 1961 | 301 S.Ridge Road, Lake Forest, Illinois, 60045, United States |
| GUEST, Richard Hamilton RESIGNED | Director | 02 May 2006 | 13 Feb 2007 | England | January 1958 | 7 Townshend Road, Richmond, TW9 1XH |
| MUNK, Peter RESIGNED | Director | 03 Apr 2006 | 23 Jul 2010 | United Kingdom | July 1963 | 58 Geffers Ride, Ascot, Berkshire, SL5 7JZ |
| PAGE, Andrew Stephen RESIGNED | Director | 20 Apr 2011 | 07 Jul 2015 | England | May 1957 | 29, Russell Avenue, Bedford, Bedfordshire, MK40 3TD, England |
| PAGE, Andrew Stephen RESIGNED | Director | 10 Aug 2005 | 30 Nov 2006 | England | May 1957 | 29 Russell Avenue, Bedford, Bedfordshire, MK40 3TD |
| SCHNEIDER, Pamela Rolnick RESIGNED | Director | 05 Jun 2020 | 11 Sep 2025 | United States | November 1959 | Millennium House, 65 Walton Street, Aylesbury, HP21 7QG, England |
| THOMAS, Walter Joe, Dr RESIGNED | Director | 14 Mar 2017 | 22 May 2020 | United Kingdom | April 1966 | Oxford House, Oxford Road, Aylesbury, Buckinghamshire, HP21 8SZ |
| WELLS, Simon Howard George RESIGNED | Director | 20 Oct 2011 | 14 Mar 2017 | England | May 1962 | 55, Waine Close, Mount Pleasant, Buckingham, MK18 1FF, England |