| BECKER-SMITH, Cassandra ACTIVE | Director | 27 Jun 2019 | | England | June 1979 | Enigma, Wavendon Business Park, Milton Keynes, MK17 8LX, England |
| MALLIA, Franco Paul ACTIVE | Director | 01 Dec 2010 | | England | September 1963 | Enigma, Wavendon Business Park, Milton Keynes, MK17 8LX, England |
| EDGAR, Martin Brock RESIGNED | Secretary | | 10 May 1996 | | | Vine House 11 The Vineyard, Richmond, Surrey, TW10 6AQ |
| FLETCHER, Stephen Maxwell RESIGNED | Secretary | 31 Mar 1999 | 31 Dec 2013 | | | Hertford House, Hertford Place, Maple Cross, Rickmansworth, Hertfordshire, WD3 9AB, England |
| HIPKIN, Gordon RESIGNED | Secretary | 10 May 1996 | 31 Mar 1999 | | | 163 Reading Road, Wokingham, Berkshire, RG11 1LJ |
| REEVES, Gwyn RESIGNED | Secretary | 01 Jan 2014 | 14 Feb 2020 | | | Enigma, Wavendon Business Park, Milton Keynes, MK17 8LX, England |
| REEVES, Gwyn RESIGNED | Secretary | 31 Dec 2013 | 31 Dec 2013 | | | Hertford House, Hertford Place, Maple Cross, Rickmansworth, Hertfordshire, WD3 9AB, England |
| ANDERSON, Ronald Carl RESIGNED | Director | 03 Jun 1994 | 31 May 1998 | | May 1933 | 1702 Clair Martin Place, Ambler, Pennsylvania, 19002, Usa |
| BUETIKOFER, Peter RESIGNED | Director | 30 Jun 1993 | 31 Jan 1993 | | May 1952 | Coombe Hill House, 176 Coombe Lane West, Kingston Upon Thames, Surrey, KT2 7DE |
| CARR, Patrick James Matthew RESIGNED | Director | | 31 May 1994 | | March 1945 | 61 St Huberts Close, Gerrards Cross, Buckinghamshire, SL9 7EN |
| FLETCHER, Stephen Maxwell RESIGNED | Director | 03 Jun 1994 | 31 Dec 2013 | England | October 1952 | Hertford House, Hertford Place, Maple Cross, Rickmansworth, Hertfordshire, WD3 9AB, England |
| GOULD, Mary Kay RESIGNED | Director | 20 Feb 2005 | 03 Jun 2013 | Usa | April 1949 | Hertford House, Hertford Place, Maple Cross, Rickmansworth, Hertfordshire, WD3 9AB, England |
| JONES, Bobette RESIGNED | Director | 29 Jan 1992 | 03 Jun 1994 | | September 1928 | 31 Manchester Court, Berwyn, Pennsylvania 19312, FOREIGN, Usa |
| KEENE, Susan Temple RESIGNED | Director | 09 Jun 1998 | 20 Jul 2004 | | April 1955 | 502 E Lawn Avenue, Lansdale, Pennsylvania, 19446, America |
| MCCUTCHEON, Michael RESIGNED | Director | 31 Mar 2008 | 31 May 2008 | England | October 1946 | 8 Lammas Road, Watton At Stone, Hertford, Hertfordshire, SG14 3RH |
| MCCUTCHEON, Michael RESIGNED | Director | 18 Dec 2000 | 08 Feb 2008 | England | October 1946 | 8 Lammas Road, Watton At Stone, Hertford, Hertfordshire, SG14 3RH |
| MURPHY, Leonard Charles RESIGNED | Director | | 30 Jun 1993 | | October 1941 | The Apple Yard, Stylecroft Road, Chalfont St Giles, Bucks, HP8 4HY |
| PAI, Amarnath Kochikar RESIGNED | Director | 23 Nov 1993 | 18 Dec 1995 | | January 1951 | Widenhem House, West Common, Gerrards Cross, Buckinghamshire, SL9 7QN |
| PERRY, John William RESIGNED | Director | | 01 May 1994 | | September 1938 | Great Barn Sandpit Lane, Bledlow, Princes Risborough, Buckinghamshire, HP27 9QQ |
| PIERCY, Matthew Roy RESIGNED | Director | 19 Dec 2007 | 28 Jun 2019 | England | February 1961 | 1st Floor, Building 6, Chiswick Park, 566 Chiswick High Road, London, W4 5HR, United Kingdom |
| PINK, Stephen John RESIGNED | Director | 22 Jul 1996 | 17 Jul 1999 | | November 1951 | 116 Cotswold Gardens, London, NW2 1PN |
| SCOTT, Douglas Berwick RESIGNED | Director | | 07 Jun 1995 | United Kingdom | July 1953 | 26 Queens Acre, Kings Road, Windsor, Berkshire, SL4 2BE |
| SPILLER, David James RESIGNED | Director | 18 Dec 2000 | 31 May 2008 | England | April 1953 | 7 Thaxted Green, Hutton, Brentwood, Essex, CM13 1YH |
| UNRUH, James Arlen RESIGNED | Director | | 29 Jan 1992 | | March 1941 | 208 Rose Lane, Haverford Pennsylvania 19041, FOREIGN, Usa |
| WHITE, Mark Robert RESIGNED | Director | 07 Jun 1995 | 12 Jul 1996 | | July 1958 | 29 Hogback Wood Road, Beaconsfield, Buckinghamshire, HP9 1JT |