| KHATRI, Yogesh ACTIVE | Director | 24 Jun 2013 | | England | October 1965 | 216, Bath Road, Slough, Berkshire, SL1 4EN, England |
| REYNDERS, Nico Victor ACTIVE | Director | 01 Dec 2024 | | United Kingdom | August 1972 | 208 Bath Road, Slough, Berkshire, SL1 3WE |
| HARDY, Mark Glyn RESIGNED | Secretary | 29 Oct 2004 | 01 Oct 2023 | | | 216 Bath Road, Slough, Berkshire, SL1 4EN |
| SLATER, John Andrew Duncan RESIGNED | Secretary | | 29 Oct 2004 | | | 216 Bath Road, Slough, Berkshire, SL1 4EN |
| ALLEN, Peter Vance RESIGNED | Director | 27 Feb 1992 | 17 Dec 2004 | | March 1956 | 216 Bath Road, Slough, Berkshire, SL1 4EN |
| ANDO, Goran Albert Torstensson, Doctor RESIGNED | Director | 16 Apr 2003 | 29 Oct 2004 | | March 1949 | 216 Bath Road, Slough, Berkshire, SL1 4EN |
| ARTUS, Ronald Edward RESIGNED | Director | | 24 Apr 1991 | | October 1931 | 8 Mercers Place, London, W6 7BZ |
| BAINS, Harbinder Singh RESIGNED | Director | 10 May 2005 | 28 Feb 2006 | | June 1965 | 216 Bath Road, Slough, Berkshire, SL1 4EN |
| BENTLEY, Michael John RESIGNED | Director | 04 Jun 1992 | 01 Oct 1993 | | November 1933 | 37 Kensington Park Gardens, London, W11 2QT |
| BERRIMAN, John Edward RESIGNED | Director | 16 Jan 1995 | 26 Apr 1996 | | April 1948 | 216 Bath Road, Slough, Berkshire, SL1 4EN |
| BERRIMAN, John Edward RESIGNED | Director | | 03 Oct 1994 | United Kingdom | April 1948 | Blackrock Manor Road, Goring, Reading, Berkshire, RG8 9DP |
| BIRCH, John Robert RESIGNED | Director | | 04 Jun 1992 | | August 1945 | 27 School Close, High Wycombe, Buckinghamshire, HP11 1PH |
| BLOXHAM, David Phillip RESIGNED | Director | | 08 Dec 1997 | | May 1947 | 216 Bath Road, Slough, Berkshire, SL1 4EN |
| BRADING, Claire RESIGNED | Director | 01 Jan 2021 | 01 Dec 2024 | England | September 1981 | 216, Bath Road, Slough, Berkshire, SL1 4EN, England |
| COOMBES, Dan RESIGNED | Director | 08 Oct 2018 | 01 Jan 2021 | United Kingdom | May 1975 | 208 Bath Road, Slough, Berkshire, SL1 3WE |
| DE CANNART D'HAMALE, Michele RESIGNED | Director | 22 Jun 2005 | 29 Apr 2011 | Belgium | May 1951 | Rue Aux Laines, 21-100, Brussels, FOREIGN, Belgium |
| DIFFERDING, Edmond RESIGNED | Director | 25 May 2009 | 01 Apr 2010 | Belgium | November 1955 | 55, Route De Blocry, B-1348 Louvain-La-Neuve, Belgium |
| DIFFERDING, Edmond RESIGNED | Director | 13 Dec 2007 | 25 May 2009 | Belgium | November 1955 | 55, Route De Blocry, B-1348 Louvain-La-Neuve, Belgium |
| DONCK, Jean-Christophe RESIGNED | Director | 25 May 2009 | 31 May 2011 | Belgium | April 1963 | 2a, Rue Bois Henri, 1341 Ceroux-Mousty, Belgium |
| DONCK, Jean-Christophe RESIGNED | Director | 13 Dec 2007 | 25 May 2009 | Belgium | April 1963 | 2a, Rue Bois Henri, 1341 Ceroux-Mousty, Belgium |
| FELLNER, Peter John, Dr RESIGNED | Director | | 16 Apr 2003 | | December 1943 | 216 Bath Road, Slough, Berkshire, SL1 4EN |
| HARDY, Mark Glyn RESIGNED | Director | 17 Dec 2004 | 01 Oct 2023 | United Kingdom | June 1953 | 216 Bath Road, Slough, Berkshire, SL1 4EN |
| HUCKLE, John George RESIGNED | Director | | 30 Oct 1991 | | September 1943 | Hall End Farm Lower Road, Stoke Mandeville, Aylesbury, Berkshire, HP22 5XA |
| JACKSON, John Bernard Haysom RESIGNED | Director | | 01 Oct 1993 | United Kingdom | May 1929 | Summit House, Red Lion Square, London, WC1R 4QB |
| JACKSON, Robert Charles, Doctor RESIGNED | Director | 29 Sep 1999 | 25 May 2000 | United Kingdom | June 1943 | 51 North Road, Whittlesford, Cambridge, Cambridgeshire, CB2 4NZ |
| JOHNSCHER, Gerd RESIGNED | Director | 13 Dec 2007 | 25 May 2009 | | April 1947 | 9 Alfons Stesselstraat, B-3012, Wilsele, Belgium |
| JONES, Stephen Charles RESIGNED | Director | 28 Feb 2006 | 30 Jun 2013 | United Kingdom | August 1952 | 216 Bath Road, Slough, Berkshire, SL1 4EN |
| KLITGAARD, Henrik Valdemar RESIGNED | Director | 25 May 2009 | 31 May 2011 | Belgium | January 1957 | 5, Avenue Des Chenes, 1180 Uccle, Belgium |
| KLITGAARD, Henrik Valdemar RESIGNED | Director | 13 Dec 2007 | 25 May 2009 | Belgium | January 1957 | 5, Avenue Des Chenes, 1180 Uccle, Belgium |
| LEE, Melanie Georgina, Doctor RESIGNED | Director | 24 Sep 1998 | 31 Aug 2009 | | July 1958 | 216 Bath Road, Slough, Berkshire, SL1 4EN |
| LORD PHILLIPS OF ELLESMERE, Lord RESIGNED | Director | | 01 Oct 1993 | | March 1924 | 35 Addisland Court, London, W14 8DA |
| MYNERS, Paul RESIGNED | Director | | 24 Apr 1991 | | April 1948 | 34 Groom Place, Belgravia, London, SW1X 7BA |
| NEY, Ursuala Mary, Dr RESIGNED | Director | 31 Oct 2000 | 31 Dec 2001 | | January 1952 | 216 Bath Road, Slough, Berkshire, SL1 4EN |
| NICHOLLS, Peter Geoffrey RESIGNED | Director | 31 Jan 2005 | 02 Oct 2009 | England | June 1949 | 216 Bath Road, Slough, Berkshire, SL1 4EN |
| NORRIS, Allen Edwin RESIGNED | Director | 25 May 2009 | 31 May 2011 | Belgium | June 1947 | 77, Avenue Des Villas, 1090 Brussels, Belgium |
| NORRIS, Allen Edwin RESIGNED | Director | 13 Dec 2007 | 25 May 2009 | Belgium | June 1947 | 77, Avenue Des Villas, 1090 Brussels, Belgium |
| OLUWA, Olufunlayo Modupe RESIGNED | Director | 01 Jan 2024 | 01 Dec 2024 | United Kingdom | January 1968 | 208 Bath Road, Slough, Berkshire, SL1 3WE |
| ROELANDT, Erik RESIGNED | Director | 22 Jun 2005 | 24 Jul 2010 | Belgium | July 1964 | 208 Bath Road, Slough, Berkshire, SL1 3WE |
| ROSS, Iain Gladstone RESIGNED | Director | 27 Jun 1991 | 31 Oct 1995 | England | January 1954 | Herons Ghyll, Tilford Road, Tilford, Surrey, GU10 2DD |
| SEYMOUR, Donald Edwin RESIGNED | Director | | 24 Apr 1991 | | November 1919 | 55 Bishops Road, Tewin Wood, Welwyn, Hertfordshire, AL6 0NP |
| SIDDALL, Sidney Stewart RESIGNED | Director | 24 Apr 1991 | 01 Oct 1993 | | April 1936 | The Manor House Ellesfield, School Lane, Welwyn, Hertfordshire, AL6 9DX |
| SIDI-SAID, Hocine RESIGNED | Director | 13 Dec 2007 | 25 May 2009 | | March 1965 | 113 Av Franklin Roosevelt, 1050 Brussels, Belgium |
| SODEN, Christine Helen RESIGNED | Director | 29 Sep 1999 | 10 Nov 1999 | | June 1957 | 16 Belle Vue Close, Staines, Middlesex, TW18 2HY |
| THIAN, Robert Peter RESIGNED | Director | 24 Apr 1991 | 01 Oct 1993 | | August 1943 | 15a Princes Gate Mews, London, SW7 2PS |
| TURLEY, Stephen RESIGNED | Director | 13 Apr 2017 | 08 Oct 2018 | England | July 1969 | 216, Bath Road, Slough, SL1 3WE, England |
| VAN DER TOORN, Adriaan Cornelis RESIGNED | Director | 24 Jul 2010 | 17 Dec 2014 | Belgium | December 1971 | 208 Bath Road, Slough, Berkshire, SL1 3WE |
| VERMEESCH, Luc RESIGNED | Director | 25 May 2009 | 04 Apr 2014 | Belgium | September 1956 | 30, Chemin De Wavre, Bousval 1470, Belgium |
| VERMEESCH, Luc RESIGNED | Director | 13 Dec 2007 | 25 May 2009 | Belgium | September 1956 | 39 Chemin De Wavre, Bousval, 1470, Belgium |
| WOOD, Martin Francis, Sir RESIGNED | Director | | 04 Jun 1992 | England | April 1927 | The Manor House, Little Wittenham, Abingdon, Oxfordshire, OX14 4RA |