| BULLOCK, Jonathan Andrew ACTIVE | Director | 08 Dec 2020 | | England | June 1975 | Grantham Close, York Way, Royston, Hertfordshire, SG8 5WY |
| BUSHNELL, Dominic Christian ACTIVE | Director | 08 Dec 2020 | | England | July 1970 | Grantham Close, York Way, Royston, Hertfordshire, SG8 5WY |
| KALINOWSKI, Mark James Adam ACTIVE | Director | 01 Jul 2023 | | United Kingdom | November 1965 | Grantham Close, York Way, Royston, Hertfordshire, SG8 5WY |
| CAMPBELL, David RESIGNED | Secretary | 23 Jul 2010 | 07 Oct 2019 | | | Grantham Close, York Way, Royston, Hertfordshire, SG8 5WY, United Kingdom |
| FEGAN, Scott RESIGNED | Secretary | 08 Dec 2020 | 01 Mar 2024 | | | Grantham Close, York Way, Royston, Hertfordshire, SG8 5WY |
| HOUSE, James RESIGNED | Secretary | 07 Oct 2019 | 08 Dec 2020 | | | Grantham Close, York Way, Royston, Hertfordshire, SG8 5WY |
| KNELL, Thomas Alexander RESIGNED | Secretary | 06 Jul 1998 | 23 Jul 2010 | | | 14 Thirlmere, Huntingdon, Cambridgeshire, PE29 6UJ |
| SECRETARIAL APPOINTMENTS LIMITED RESIGNED | Nominee Secretary | 06 Jul 1998 | 06 Jul 1998 | | | 16 Churchill Way, Cardiff, CF10 2DX |
| ARCHER, John Richard RESIGNED | Director | 06 Jul 1998 | 31 Mar 2004 | England | February 1952 | Lidgate Grange, The Street, Lidgate, Newmarket, Suffolk, CB8 9PW |
| BAIER, Manfred RESIGNED | Director | 01 Mar 2012 | 31 Dec 2013 | Germany | December 1951 | Grantham Close, York Way, Royston, Hertfordshire, SG8 5WY, United Kingdom |
| BULLOCK, Matthew Peter Dominic, The Hon RESIGNED | Director | 04 Jan 1999 | 31 Mar 2012 | United Kingdom | June 1949 | Easby House, High Street Great Chesterford, Saffron Walden, Essex, CB10 1PL |
| CAMPBELL, David RESIGNED | Director | 01 May 2015 | 07 Oct 2019 | England | March 1967 | Grantham Close, York Way, Royston, Hertfordshire, SG8 5WY |
| CAMPBELL, David RESIGNED | Director | 06 Apr 2013 | 31 Dec 2013 | England | March 1967 | Grantham Close, York Way, Royston, Hertfordshire, SG8 5WY, United Kingdom |
| COOKE, Nicholas Vandeleur RESIGNED | Director | 01 May 2015 | 08 Dec 2020 | England | September 1964 | Grantham Close, York Way, Royston, Hertfordshire, SG8 5WY |
| COOKE, Nicholas Vandeleur RESIGNED | Director | 05 Jun 2000 | 31 Dec 2013 | England | September 1964 | 4 Poplar Farm Close, North End, Bassingbourn, Royston, Hertfordshire, SG8 5NA |
| CUMPSTEY, David Edward RESIGNED | Director | 13 Aug 1998 | 31 Mar 2004 | | July 1951 | 1 Rhee Meadows, Barrington, Cambridge, CB2 5GA |
| EDWARDS, Jacqueline Ann RESIGNED | Director | 06 Apr 2002 | 20 Jul 2005 | England | February 1957 | The Paddock, Pedlars Lane, Therfield, Royston, Hertfordshire, SG8 9PX |
| EVANS, Michael Robert, Dr RESIGNED | Director | 09 Dec 2005 | 31 Dec 2013 | United Kingdom | February 1958 | Top Meadow, Routs Green, Bledlow Ridge, Buckinghamshire, HP14 4BB |
| FEGAN, Scott RESIGNED | Director | 08 Dec 2020 | 01 Mar 2024 | England | March 1970 | Grantham Close, York Way, Royston, Hertfordshire, SG8 5WY |
| FOX, James Charles RESIGNED | Director | 19 Oct 1998 | 12 Oct 1999 | | September 1951 | 8 Redwood Drive Notting Hill, Melbourne 3186, Victoria Australia, FOREIGN |
| HARRISON, William John RESIGNED | Director | 11 Sep 1998 | 31 Mar 2002 | | November 1953 | Ingleside 3 Shepreth Lake, Dunsbridge Turnpike Shepreth, Royston, Hertfordshire, SG8 6UP |
| KNOX, Peter, Dr RESIGNED | Director | 04 Dec 2000 | 31 Jan 2009 | United Kingdom | November 1948 | Arn Cottage, 34 East Lockinge, Wantage, Oxfordshire, OX12 8QG |
| LONG, Ronald Eric RESIGNED | Director | 16 Nov 2001 | 31 Oct 2005 | United Kingdom | January 1947 | Procognia Limited, Unit 4 The Switchback, Gardner Road, Maidenhead, Berkshire, SL6 7RJ |
| MORFFEW, Andrew RESIGNED | Director | 12 Jan 2004 | 03 Apr 2009 | | August 1950 | 1 Shelley Close, Itchen Abbas, Winchester, Hampshire, SO21 1AU |
| NEWBLE, David Allan RESIGNED | Director | 31 Dec 2013 | 01 May 2015 | United Kingdom | January 1971 | Grantham Close, York Way, Royston, Hertfordshire, SG8 5WY, United Kingdom |
| NEWBLE, David Allan RESIGNED | Director | 09 Jan 2006 | 31 Dec 2013 | United Kingdom | January 1971 | Little Chilfords, Back Road, Linton, Cambridgeshire, CB21 4LF |
| OWEN, Stephen RESIGNED | Director | 06 Jul 1998 | 31 Dec 2013 | England | July 1957 | The Old Station Old North Road, Bourn, Cambridge, Cambridgeshire, CB3 7TZ |
| PARNELL, David Gordon, Dr RESIGNED | Director | 28 Aug 1998 | 06 Jan 2011 | United Kingdom | December 1949 | 8 Greenford Close, Orwell, Royston, Herts, SG8 5QA |
| PEUKER, Thorsten, Dr RESIGNED | Director | 18 Feb 2019 | 31 May 2023 | Germany | January 1973 | Tap, Grantham Close, York Way, Royston, SG8 5WY, England |
| PHILLIPS, David Tudor RESIGNED | Director | 16 Dec 2002 | 17 Sep 2004 | | October 1958 | 46 Kingsley Avenue, Ealing, London, W13 0EG |
| SEFTON, Phillip Bryan RESIGNED | Director | 04 Jan 2010 | 31 Dec 2013 | England | October 1960 | Grantham Close, York Way, Royston, Hertfordshire, SG8 5WY, United Kingdom |
| VOGT, Reinhard RESIGNED | Director | 31 Dec 2013 | 18 Feb 2019 | Germany | August 1955 | Grantham Close, York Way, Royston, Hertfordshire, SG8 5WY, United Kingdom |
| VOGT, Susan Leah Novak, Ms. RESIGNED | Director | 06 Jan 2011 | 31 Dec 2013 | Usa | December 1953 | Grantham Close, York Way, Royston, Hertfordshire, SG8 5WY, United Kingdom |
| WARD, Martyn Thomas RESIGNED | Director | 04 Jul 2005 | 08 Sep 2006 | United Kingdom | December 1965 | The Oaks, Eagle Farm, Baythorne End, Halstead, Essex, CO9 4AF |
| WESSEL, Matthias RESIGNED | Director | 31 Dec 2013 | 18 Feb 2019 | Germany | May 1966 | Grantham Close, York Way, Royston, Hertfordshire, SG8 5WY, United Kingdom |
| CORPORATE APPOINTMENTS LIMITED RESIGNED | Nominee Director | 06 Jul 1998 | 06 Jul 1998 | | | 16 Churchill Way, Cardiff, CF10 2DX |
| SECRETARIAL APPOINTMENTS LIMITED RESIGNED | Director | 06 Jul 1998 | 06 Jul 1998 | | | 16 Churchill Way, Cardiff, CF10 2DX |