| LAWES, Nikita Kaushik ACTIVE | Secretary | 02 Sep 2026 | | | | 103-105, Bath Road, Slough, Berkshire, SL1 3UH, United Kingdom |
| EISENHARDT, Shannon Sue ACTIVE | Director | 14 Feb 2024 | | United Kingdom | September 1974 | 103-105 Bath Road, Slough, Berkshire, SL1 3UH |
| GREENE, Thomas Richard Etienne ACTIVE | Director | 15 Apr 2021 | | United Kingdom | October 1974 | 103-105, Bath Road, Slough, Berkshire, SL1 3UH, United Kingdom |
| HODGES, James Edward ACTIVE | Director | 14 Feb 2022 | | England | May 1977 | 103-105, Bath Road, Slough, Berkshire, SL1 3UH, United Kingdom |
| MANSELL, James Douglas Colin ACTIVE | Director | 18 Aug 2025 | | United Kingdom | February 1984 | 103-105, Bath Road, Slough, Berkshire, SL1 3UH, United Kingdom |
| RICHARDS, Tanya Claire ACTIVE | Director | 12 Feb 2025 | | United Kingdom | April 1971 | 103-105, Bath Road, Slough, Berkshire, SL1 3UH, United Kingdom |
| HODGES, James Edward RESIGNED | Secretary | 05 Mar 2026 | 02 Sep 2026 | | | 103-105, Bath Road, Slough, Berkshire, SL1 3UH, United Kingdom |
| HODGES, James Edward RESIGNED | Secretary | 08 Jun 2020 | 08 Feb 2025 | | | 103-105, Bath Road, Slough, Berkshire, SL1 3UH, United Kingdom |
| JONES, Jonathan Hugh RESIGNED | Secretary | 30 Jun 2000 | 01 Feb 2003 | | | 28 Colebrooke Avenue, Ealing, London, W13 8JY |
| KENWARD, Sally RESIGNED | Secretary | 08 Feb 2025 | 05 Mar 2026 | | | 103-105, Bath Road, Slough, Berkshire, SL1 3UH, England |
| LOGAN, Christine Anne-Marie RESIGNED | Secretary | 16 Dec 2014 | 08 Jun 2020 | | | 103-105 Bath Road, Slough, Berkshire, SL1 3UH |
| RICHARDSON, Elizabeth Anne RESIGNED | Secretary | 01 Feb 2003 | 16 Dec 2014 | | | 103-105 Bath Road, Slough, Berkshire, SL1 3UH |
| SALTMARSH, Philip David RESIGNED | Secretary | | 30 Jun 2000 | | | 106 Broadwood Avenue, Ruislip, Middlesex, HA4 7XT |
| BATTAGLIA, Alfred Joseph RESIGNED | Director | 11 Mar 1997 | 30 Sep 1999 | | March 1942 | Richmond Bridge Apartments, 8 Blanchard, Twickenham, Middlesex, TW1 2TD |
| BEALER, Christopher James RESIGNED | Director | 28 Mar 2024 | 29 Jan 2025 | United Kingdom | June 1976 | 103-105, Bath Road, Slough, Berkshire, SL1 3UH, United Kingdom |
| BECHT, Lambertus Johannes Hermanus RESIGNED | Director | 03 Dec 1999 | 22 Jul 2009 | England | July 1956 | Heather Cottage Cross Road, Suningdale, Berkshire, SL5 9RX |
| BELLAMY, Adrian David Presland RESIGNED | Director | 03 Dec 1999 | 23 Oct 2007 | United Kingdom | February 1942 | 233 West Santa Inez Avenue, Hillsborough, California 94010, 6860, Usa |
| BROWN, Colin Carlyle Campbell RESIGNED | Director | | 31 Mar 1995 | | November 1940 | Little Bower, 10 Nuns Walk, Virginia Water, Surrey, GU25 4RT |
| CARR, Jeffrey RESIGNED | Director | 09 Apr 2020 | 31 Mar 2024 | United Kingdom | September 1961 | 103-105, Bath Road, Slough, Berkshire, SL1 3UH, United Kingdom |
| CLEMENTS, Patrick Norris, Dr RESIGNED | Director | 03 Jun 2013 | 30 Apr 2016 | United Kingdom | July 1964 | 103-105 Bath Road, Slough, Berkshire, SL1 3UH |
| COLMAN, Michael Jeremiah, Sir RESIGNED | Director | | 31 Aug 1995 | United Kingdom | July 1928 | Malshanger, Basingstoke, Hampshire, RG23 7EY |
| DALBY, Alan James RESIGNED | Director | | 10 May 2001 | | January 1937 | 944 Shootflying Hills Road, Centreville, Ma 02632, Usa |
| DARNTON, Phillip Leyland RESIGNED | Director | 17 Jul 1996 | 31 Oct 1999 | United Kingdom | January 1943 | 75 Limerston Street, London, SW10 0BL |
| DAVIES, Candida Jane RESIGNED | Director | 01 Oct 2015 | 13 Dec 2017 | England | December 1973 | 103-105, Bath Road, Slough, Berkshire, SL1 3UH, United Kingdom |
| DAWAR, Manish RESIGNED | Director | 22 Jul 2009 | 31 Jul 2012 | United Kingdom | December 1965 | 10, Merryman Drive, Crowthorne, Berkshire, RG45 6TW |
| DAY, Colin Richard RESIGNED | Director | 04 Sep 2000 | 08 Feb 2011 | England | March 1955 | 103-105 Bath Road, Slough, Berkshire, SL1 3UH |
| DE MEL, John Chitrapri Lalith RESIGNED | Director | 01 Oct 1991 | 19 May 1999 | | May 1937 | 22 Chelwood Gardens, Kew, Richmond, Surrey, TW9 4JQ |
| DIXON, John Charles RESIGNED | Director | 01 Nov 2016 | 11 Sep 2023 | United Kingdom | May 1956 | 103-105, Bath Road, Slough, Berkshire, SL1 3UH, United Kingdom |
| DOBBIE, Iain George RESIGNED | Director | | 31 Mar 1998 | | October 1937 | Cedar Ridge 218 Upper Chobham Road, Camberley, Surrey, GU15 1HD |
| DOHERTY, Mary Elizabeth RESIGNED | Director | 08 Feb 2011 | 12 Feb 2013 | England | October 1957 | 103-105 Bath Road, Slough, Berkshire, SL1 3UH |
| EDWARDS, Simon Jeremy RESIGNED | Director | 25 Oct 2007 | 11 Dec 2013 | United Kingdom | April 1961 | 103-105 Bath Road, Slough, Berkshire, SL1 3UH |
| EHMANN, Carl William, Dr RESIGNED | Director | 17 Jul 1996 | 17 Jul 1999 | | August 1942 | Fairlawn Fairlawn Park, St Leonards Hill Road, Windsor, Berkshire, SL4 4HL |
| FOSTER, Roderick Mark Macdonald RESIGNED | Director | | 31 Mar 1994 | | October 1935 | Frieston Old Place, Caythorpe, Grantham, Lincolnshire, NG32 3BY |
| GREENER, George Pallister, Dr RESIGNED | Director | 12 Feb 1996 | 04 May 2006 | United Kingdom | July 1945 | 2 Beechwood Drive, Maidenhead, Berkshire, SL6 4NE |
| GREENSMITH, Richard Mark RESIGNED | Director | 21 Apr 2016 | 01 Nov 2016 | England | June 1973 | 103-105 Bath Road, Slough, Berkshire, SL1 3UH |
| HARF, Gerd Peter, Dr RESIGNED | Director | 03 Dec 1999 | 23 Oct 2007 | Uk | May 1946 | Piazza Sant'Ambrogio 8, Milan, 20123, FOREIGN, Italy |
| HEARNE, Graham James, Sir RESIGNED | Director | | 14 May 1997 | United Kingdom | November 1937 | 19 St Swithins Lane, London, EC4P 4DU |
| HENNAH, Adrian Nevil RESIGNED | Director | 01 Oct 2015 | 09 Apr 2020 | United Kingdom | November 1957 | 103-105, Bath Road, Slough, Berkshire, SL1 3UH, United Kingdom |
| HODGES, James Edward RESIGNED | Director | 16 Dec 2020 | 15 Apr 2021 | England | May 1977 | 103-105, Bath Road, Slough, Berkshire, SL1 3UH, United Kingdom |
| HYDON, Kenneth John RESIGNED | Director | 01 Dec 2003 | 23 Oct 2007 | England | November 1944 | The Maples Crowsley Road, Shiplake, Henley On Thames, Oxfordshire, RG9 3LD |
| KEELEY, Martin Spencer RESIGNED | Director | 30 Jan 2009 | 28 Apr 2012 | United Kingdom | March 1956 | Kenmore, Devenish Road, Sunningdale, Berkshire, SL5 9PF |
| KNEE, Peter Creasey RESIGNED | Director | | 29 Oct 1991 | | October 1929 | 2 Queens Gate, London, SW7 5EH |
| LARRECHE, Jean-Claude RESIGNED | Director | | 10 May 2001 | | July 1947 | 85 Rue Murger, 77780 Bourron-Marlotte, France |
| LLOPIS, Ana Maria, Dr RESIGNED | Director | 02 Nov 1998 | 05 May 2005 | | August 1950 | Salustiano De Olozaga 14 2 Dcha, 28001 Madrid, FOREIGN, Spain |
| MACKAY, Ernest Arthur Graham RESIGNED | Director | 25 Feb 2005 | 23 Oct 2007 | | July 1949 | Flat 3 18 Bruton Place, Mayfair, London, W1J 6LY |
| MARTEL, Timothy John RESIGNED | Director | 08 Jun 2020 | 14 Feb 2024 | United Kingdom | January 1975 | 103-105, Bath Road, Slough, Berkshire, SL1 3UH, United Kingdom |
| MAYDON, Peter John RESIGNED | Director | | 27 Mar 1997 | United Kingdom | March 1942 | White Cottage, North Heath Chieveley, Newbury, Berkshire, RG20 8UA |
| MEUDERSCHEID, Dieter Oskar Leonard RESIGNED | Director | 03 Dec 1999 | 07 May 2003 | | January 1936 | Charlotte-Niese Str 1b, Hamburg, 22609, Germany |
| MOGREN, Hakan Lars, Dr Sc RESIGNED | Director | 29 Nov 2000 | 07 May 2003 | | September 1944 | 15 Stanhope Gate, London, W1K 1LN |
| MORDAN, William Richard RESIGNED | Director | 31 Jul 2012 | 01 Oct 2015 | United Kingdom | September 1969 | 103-105 Bath Road, Slough, Berkshire, SL1 3UH |
| MURPHY, Gerard Martin, Dr RESIGNED | Director | 20 Jun 2005 | 23 Oct 2007 | | November 1955 | 11 Ellerton House, 11 Bryanston Square, London, W1H 2FF |
| NEVILLE, Simon Andrew RESIGNED | Director | 01 Oct 2016 | 01 Jul 2020 | United Kingdom | October 1957 | 103-105 Bath Road, Slough, Berkshire, SL1 3UH |
| PEACH, Alasdair James RESIGNED | Director | 20 Jul 2020 | 16 Dec 2020 | United Kingdom | June 1970 | 103-105, Bath Road, Slough, Berkshire, SL1 3UH, United Kingdom |
| PICKSTONE, Stephen Christopher Andrew RESIGNED | Director | 14 Feb 2024 | 18 Aug 2025 | England | February 1978 | 103-105, Bath Road, Slough, Berkshire, SL1 3UH, United Kingdom |
| ROSE, John Edward Victor, Sir RESIGNED | Director | 02 Apr 1997 | 10 May 2001 | | October 1952 | 28 Nassau Road, London, SW13 9QE |
| SANKEY, Vernon Louis RESIGNED | Director | | 31 Mar 1999 | | May 1949 | The Cherubs, Parsonage Lane, Farnham Common, Slough, Berkshire, SL2 3NZ |
| SPRIESER, Judith RESIGNED | Director | 21 Aug 2003 | 23 Oct 2007 | | March 1953 | 3423 Spring Road, Oak Brook, Illinois 60523, Usa |
| ST LAWRENCE, John RESIGNED | Director | | 27 May 1992 | | February 1930 | Divots Black Pond Lane, Farnham Royal, Slough, Berkshire, SL2 3EG |
| TIMMIS, Jonathan RESIGNED | Director | 16 Mar 2018 | 08 Jun 2020 | England | June 1975 | 103-105 Bath Road, Slough, Berkshire, SL1 3UH |
| TURRELL, Michael Frederick RESIGNED | Director | 01 Oct 1991 | 03 Dec 1999 | | July 1943 | Meadow Vale Lodge, Stokesheath Road, Oxshott, Surrey, KT22 0PS |
| TYLER, David Alan RESIGNED | Director | 26 Feb 2007 | 23 Oct 2007 | | January 1953 | 6 Ernle Road, Wimbledon, London, SW20 0HJ |
| VALENTINE, Michael Robert RESIGNED | Director | | 12 May 1998 | | January 1928 | 33 Keswick Road, London, SW15 2JA |
| VAN DER WIELEN, Johannes Cornelis Theodorus RESIGNED | Director | 03 Dec 1999 | 05 May 2005 | | July 1943 | Duinlustweg 6, Wassenaar 2243 Gp, Holland |
| WHITE, Peter Richard, Mr. RESIGNED | Director | 01 Dec 1997 | 23 Oct 2007 | England | February 1942 | Down House, The Hildens, Westcott, Dorking, Surrey, RH4 3JX |
| WILLIAMS, Gareth Robert RESIGNED | Director | 16 Dec 2020 | 15 Apr 2021 | United Kingdom | September 1978 | 103-105, Bath Road, Slough, Berkshire, SL1 3UH, United Kingdom |
| WILSON, Mark Raymond RESIGNED | Director | 25 Oct 2007 | 30 Jan 2009 | | February 1968 | 37 Balmoral Gardens, Windsor, Berkshire, SL4 3SG |
| WILSON, Stephen Roy RESIGNED | Director | 10 Mar 1998 | 30 Sep 1999 | | October 1946 | Flat 5 3 Belgrave Place, Belgravia, London, SW1X 8LP |