| ALLAN, Peter Gerard, Dr ACTIVE | Director | 04 Dec 2025 | | United Kingdom | February 1961 | 2-4, Packhorse Road, Gerrards Cross, Buckinghamshire, SL9 7QE, England |
| BROOKES, David Alan ACTIVE | Director | 24 Oct 2024 | | England | October 1947 | St Julians, 211 Tubbenden Lane, Orpington, BR6 9NN, England |
| FEARN, Michael James ACTIVE | Director | 05 Dec 2024 | | Scotland | June 1977 | 2-4, Packhorse Road, Gerrards Cross, Buckinghamshire, SL9 7QE, England |
| GARCIA DUFFY, Cristina, Dr ACTIVE | Director | 04 Dec 2025 | | United Kingdom | May 1980 | 121, 121 George Street, Glasgow, G1 1RD, United Kingdom |
| LUFF, Richard Edward ACTIVE | Director | 04 Dec 2025 | | United Kingdom | November 1952 | 2-4, Packhorse Road, Gerrards Cross, Buckinghamshire, SL9 7QE, England |
| PATTEN, Judith Ann Innes ACTIVE | Director | 14 Dec 2020 | | United Kingdom | January 1943 | 18, Prior Park Buildings, Widcombe, Bath, United Kingdom |
| RAYNER, Ralph Frank, Dr ACTIVE | Director | 13 Dec 2016 | | England | December 1954 | 2-4, Packhorse Road, Gerrards Cross, Buckinghamshire, SL9 7QE, England |
| SCHULTZ, Gehrig Stannard, Dr ACTIVE | Director | 02 Mar 2026 | | United Kingdom | May 1964 | 2-4, Packhorse Road, Gerrards Cross, Buckinghamshire, SL9 7QE, England |
| SYKES, Benjamin John ACTIVE | Director | 07 Dec 2023 | | United Kingdom | April 1965 | 2-4, Packhorse Road, Gerrards Cross, Buckinghamshire, SL9 7QE, England |
| WALKER, Vahid ACTIVE | Director | 04 Dec 2025 | | United Kingdom | July 1981 | 2-4, Packhorse Road, Gerrards Cross, Buckinghamshire, SL9 7QE, England |
| WHITEHEAD, Graham John ACTIVE | Director | 07 Dec 2023 | | Scotland | August 1970 | 2-4, Packhorse Road, Gerrards Cross, Buckinghamshire, SL9 7QE, England |
| WYLIE, Iain Ross ACTIVE | Director | 05 Dec 2024 | | United States | December 1986 | 2-4, Packhorse Road, Gerrards Cross, Buckinghamshire, SL9 7QE, England |
| ALLWOOD, Robert Leonard, Dr RESIGNED | Secretary | 01 Dec 2009 | 31 Mar 2017 | | | 1, Fetter Lane, London, EC4A 1BR, England |
| ALLWOOD, Robert Leonard, Dr RESIGNED | Secretary | 07 Dec 2004 | 13 Dec 2007 | | | 16 Cottingham Grove, Bletchley, Milton Keynes, Buckinghamshire, MK3 5AX |
| BEVAN, John, Dr RESIGNED | Secretary | 07 Dec 1999 | 07 Dec 2004 | | | 21 Roland Way, London, SW7 3RF |
| BEVAN, John, Dr RESIGNED | Secretary | | 10 Dec 1992 | | | 21 Roland Way, London, SW7 3RF |
| BURGESS, Cheryl Ann RESIGNED | Secretary | 14 Dec 2020 | 17 Apr 2026 | | | Virginia Cottage, Bottom Street, Northend, Southam, Warwickshire, CV47 2TJ, England |
| CRAWFORD, Moya Maria RESIGNED | Secretary | 13 Dec 2007 | 09 Dec 2010 | | | Kilburns House, Newport On Tay, Fife, DD6 8PL |
| HALL, Stephen RESIGNED | Secretary | 01 Apr 2017 | 14 Dec 2020 | | | 2, John Street, London, WC1N 2ES, United Kingdom |
| HALL, Steve RESIGNED | Secretary | 09 Dec 2010 | 05 Dec 2013 | | | 7, The Paddocks, Tonna, Neath, West Glamorgan, SA11 3FD, United Kingdom |
| KIRKLEY, David William, Dr RESIGNED | Secretary | 07 Dec 1993 | 07 Dec 1995 | | | 76 Eaton Drive, Kingston Upon Thames, Surrey, KT2 7QX |
| KNIGHT, Francis Iles, Dr RESIGNED | Secretary | 07 Dec 1995 | 07 Dec 1999 | | | 78 Erlanger Road, New Cross, London, SE14 5TH |
| METCALF, Peter RESIGNED | Secretary | 10 Dec 1992 | 07 Dec 1993 | | | 38 Pennington Drive, Weybridge, Surrey, KT13 9RU |
| ABRAHAM, William Eric RESIGNED | Director | 10 Dec 1992 | 10 Dec 1998 | | June 1931 | Little Barn, Linkside North Beacon Hill, Hindhead, Surrey, GU26 6NX |
| ALLWOOD, Robert Leonard, Dr RESIGNED | Director | 10 Dec 2002 | 11 Dec 2008 | | October 1947 | 16 Cottingham Grove, Bletchley, Milton Keynes, Buckinghamshire, MK3 5AX |
| ALLWOOD, Robert Leonard, Dr RESIGNED | Director | 07 Dec 1995 | 06 Dec 2001 | | October 1947 | 16 Cottingham Grove, Bletchley, Milton Keynes, Buckinghamshire, MK3 5AX |
| ATMANAND, Malayath Aravindakshan, Dr RESIGNED | Director | 14 Dec 2020 | 07 Dec 2023 | India | September 1960 | E3, B Block, "Achyutham", Rite Choice Ganesha, 33-D, Velachery Main Rd, Chennai 600042, India |
| BAKER, David William RESIGNED | Director | 13 Dec 2016 | 01 Jan 2020 | England | December 1955 | 2, John Street, London, WC1N 2ES, United Kingdom |
| BAKER, David William RESIGNED | Director | 07 Dec 1993 | 05 Dec 1996 | England | December 1955 | 1 The Rise, Hillingdon Village, Uxbridge, Middlesex, UB10 0JJ |
| BAKER, Jeremy Hugh Alasdair, Dr RESIGNED | Director | 07 Dec 2004 | 13 Dec 2007 | | November 1950 | 24 Colthill Road, Milltimber, Aberdeenshire, AB13 0EF |
| BAKER, Jeremy Hugh Alasdair, Dr RESIGNED | Director | 05 Dec 1996 | 10 Dec 2002 | | November 1950 | 24 Colthill Road, Milltimber, Aberdeenshire, AB13 0EF |
| BALL, Ian Geoffrey RESIGNED | Director | 08 Dec 2005 | 14 Dec 2006 | England | May 1945 | 14 Pinewood Close, Stockport, Cheshire, SK4 3NF |
| BALL, Ian Geoffrey RESIGNED | Director | 10 Dec 1992 | 07 Dec 1995 | | May 1945 | 5 Arbeadie Avenue, Banchory, Kincardineshire, AB31 4EL |
| BARRETT, Robert William RESIGNED | Director | 07 Dec 1995 | 06 Dec 2001 | | September 1949 | 4 Tavistock Road, Bromley, Kent, BR2 0SY |
| BARWISE, Andrew Mark RESIGNED | Director | 01 Dec 2015 | 14 Dec 2020 | England | February 1969 | 36, Henley Meadows, Tenterden, Kent, TN30 6EN, England |
| BEVAN, John, Dr RESIGNED | Director | 01 Dec 2011 | 05 Dec 2013 | United Kingdom | December 1943 | 5, Nepean Close, Gosport, Hampshire, PO12 2BH, United Kingdom |
| BEVAN, John, Dr RESIGNED | Director | 13 Dec 2007 | 01 Dec 2011 | United Kingdom | December 1943 | 5 Nepean Close, Gosport, PO12 2BH |
| BEVAN, John, Dr RESIGNED | Director | 10 Dec 1998 | 07 Dec 2004 | | December 1943 | 21 Roland Way, London, SW7 3RF |
| BINKS, Richard Andrew RESIGNED | Director | 13 Dec 2016 | 01 Jan 2020 | England | July 1958 | 2, John Street, London, WC1N 2ES, United Kingdom |
| BINKS, Richard Andrew RESIGNED | Director | 13 Dec 2007 | 02 Dec 2014 | England | July 1958 | 79 Woodbury Avenue, Petersfield, Hampshire, GU32 2EB |
| BINKS, Richard Andrew RESIGNED | Director | 06 Dec 2001 | 08 Dec 2005 | England | July 1958 | 79 Woodbury Avenue, Petersfield, Hampshire, GU32 2EB |
| BREMNER, Philip RESIGNED | Director | 06 Dec 2001 | 07 Dec 2004 | | October 1959 | Joyphil, Whitehouse, Alford, Aberdeenshire, AB33 8DJ |
| BROOKES, David Alan RESIGNED | Director | 02 Dec 2014 | 31 Dec 2021 | England | October 1947 | St Julians, 211 Tubbenden Lane, Orpington, Kent, BR6 9NN, England |
| BROOKES, David Alan RESIGNED | Director | 01 Dec 2011 | 05 Dec 2013 | England | October 1947 | 211, Tubbenden Lane, Orpington, Kent, BR6 9NN, United Kingdom |
| BROOKES, David Alan RESIGNED | Director | 13 Dec 2007 | 01 Dec 2011 | England | October 1947 | St Julians 211 Tubbenden Lane, Orpington, Kent, BR6 9NN |
| BROOKES, David Alan RESIGNED | Director | 10 Dec 1998 | 07 Dec 2004 | England | October 1947 | St Julians 211 Tubbenden Lane, Orpington, Kent, BR6 9NN |
| BRYSON, Lindsay, Admiral Sir RESIGNED | Director | | 04 Dec 1997 | | January 1925 | 74 Dyke Road Avenue, Brighton, East Sussex, BN1 5LE |
| BYHAM, Maurice William RESIGNED | Director | | 07 Dec 1995 | United Kingdom | August 1939 | 6 Linersh Wood, Bramley, Guildford, Surrey, GU5 0EE |
| CAREY, Nigel Trevor RESIGNED | Director | 06 Dec 2021 | 07 Dec 2023 | United Kingdom | August 1965 | Old Farm, Clunton, Craven Arms, SY7 0HT, United Kingdom |
| CATTANACH, James Maccoll RESIGNED | Director | 11 Dec 2008 | 02 Dec 2014 | United Kingdom | March 1951 | 275, Connaught Road, Brookwood, Working, Surrey, GU24 0AD |
| CATTANACH, James Maccoll RESIGNED | Director | 06 Dec 2001 | 13 Dec 2007 | United Kingdom | March 1951 | 275 Connaught Road, Brookwood, Woking, Surrey, GU24 0AD |
| CATTANACH, James Maccoll RESIGNED | Director | 07 Dec 1993 | 07 Dec 1999 | United Kingdom | March 1951 | 275 Connaught Road, Brookwood, Woking, Surrey, GU24 0AD |
| COLLAR, Peter George, Dr RESIGNED | Director | 07 Dec 1995 | 10 Dec 1998 | | March 1940 | Queen Mary House Brook Road, Wormley, Godalming, Surrey, GU8 5UA |
| CONNELLY, Andrew Christopher RESIGNED | Director | 03 Dec 2018 | 07 Dec 2023 | Scotland | December 1983 | 3, Hunter Drive, Stonehaven, AB39 2BG, Scotland |
| COOK, Michael Robert RESIGNED | Director | 07 Dec 2023 | 27 Feb 2024 | England | November 1954 | 2-4, Packhorse Road, Gerrards Cross, Buckinghamshire, SL9 7QE, England |
| COOK, Michael Robert RESIGNED | Director | 02 Dec 2014 | 31 Dec 2021 | England | November 1954 | Foxhanger, Bacon Lane, Churt, Farnham, Surrey, GU10 2QE, England |
| CRAWFORD, Moya Maria RESIGNED | Director | 06 Dec 2021 | 24 Oct 2024 | Scotland | May 1958 | Kilburns, Balmerino, Newport-On-Tay, DD6 8PL, Scotland |
| CRAWFORD, Moya Maria RESIGNED | Director | 05 Dec 2013 | 13 Dec 2016 | United Kingdom | May 1958 | Kilburns House, Wormit, Newport-On-Tay, Fife, DD6 8PL, Scotland |
| CRAWFORD, Moya Maria RESIGNED | Director | 07 Dec 2004 | 09 Dec 2010 | United Kingdom | May 1958 | Kilburns House, Newport On Tay, Fife, DD6 8PL |
| CRAWFORD, Moya Maria RESIGNED | Director | 07 Dec 1995 | 06 Dec 2001 | United Kingdom | May 1958 | Kilburns House, Newport On Tay, Fife, DD6 8PL |
| CURRAN, Christopher John RESIGNED | Director | 01 Dec 2015 | 31 Dec 2021 | United States | March 1956 | 200, Westlake Park Blvd, 77079, Houston, Texas, United States |
| D ANCONA, John Edward William RESIGNED | Director | 04 Dec 1997 | 04 Dec 2003 | | May 1935 | 33 Culverley Road, Catford, London, SE6 2LD |
| DRYER, John Richard RESIGNED | Director | 04 Dec 1997 | 04 Dec 2003 | United Kingdom | September 1949 | Bracken Patch Forge Wood, Worth, Crawley, West Sussex, RH10 3NH |
| DUDGEON, Christopher Patrick RESIGNED | Director | 11 Dec 2008 | 01 Dec 2011 | United Kingdom | July 1963 | 13 Hillier Road, Guildford, Surrey, GU1 2JG |
| DUDGEON, Christopher Patrick RESIGNED | Director | 04 Dec 2003 | 13 Dec 2007 | United Kingdom | July 1963 | 13 Hillier Road, Guildford, Surrey, GU1 2JG |
| DUDGEON, Christopher Patrick RESIGNED | Director | 08 Dec 1994 | 13 Dec 2000 | | July 1963 | 44 Quarry Street, Guildford, Surrey, GU1 3XQ |
| DUFFIELD, Stephen Vincent RESIGNED | Director | 07 Dec 2023 | 04 Dec 2025 | Australia | January 1964 | 2-4, Packhorse Road, Gerrards Cross, Buckinghamshire, SL9 7QE, England |
| ELKHATIB, Sarah, Dr RESIGNED | Director | 06 Dec 2021 | 22 Jun 2023 | Norway | November 1975 | 2-4, Packhorse Road, Gerrards Cross, Buckinghamshire, SL9 7QE, England |
| FARRIER, Raymond Alan RESIGNED | Director | 01 Dec 2015 | 14 Dec 2020 | Australia | November 1953 | 11, Hayward Street, Bayswater, Perth, Australia |
| FLEMING, Philip James RESIGNED | Director | 07 Dec 1999 | 10 Dec 2002 | | January 1960 | 5 Wessels, Tadworth, Surrey, KT20 5TP |
| GOODER, John Michael RESIGNED | Director | 07 Dec 1995 | 06 Dec 2001 | | November 1954 | 25 Badgers Walk, Shiplake, Henley On Thames, Oxfordshire, RG9 3JQ |
| GRIFFITHS, Gwyn, Professor RESIGNED | Director | 05 Dec 2013 | 31 Dec 2021 | England | July 1954 | 14, Bassett Close, Southampton, Hampshire, SO16 7PE, England |
| GRIFFITHS, Gwyn, Professor RESIGNED | Director | 06 Dec 2001 | 13 Dec 2007 | England | July 1954 | 14 Bassett Close, Southampton, Hampshire, SO16 7PE |
| GRIFFITHS, Terry RESIGNED | Director | 16 Dec 2019 | 06 Dec 2022 | Australia | July 1971 | 6, Wright Avenue, Swanbourne, Western Australia, WA6010, Australia |
| HALL, David Ruthven RESIGNED | Director | 07 Dec 2004 | 13 Dec 2007 | | September 1955 | 63 Mayford Road, London, SW12 8SE |
| HALL, Stephen Peter RESIGNED | Director | 02 Dec 2014 | 31 Mar 2017 | Wales | January 1963 | 7, The Paddocks, Tonna, Neath, West Glamorgan, SA11 3FD, Wales |
| HALL, Stephen Peter RESIGNED | Director | 13 Dec 2007 | 01 Dec 2011 | Wales | January 1963 | 7, The Paddock, Tonna, Neath, West Glamorgan, SA11 3FD |
| HENDERSON, Charles Edward RESIGNED | Director | 07 Dec 1999 | 13 Dec 2007 | United Kingdom | September 1939 | 17 Sydney House, Woodstock Road, London, W4 1DP |
| HOULDER, John Maurice RESIGNED | Director | | 10 Dec 1992 | United Kingdom | February 1916 | 59 Warwick Square, London, SW1V 2AL |
| HOWELLS, Hugh, Dr RESIGNED | Director | 14 Dec 2006 | 06 Dec 2012 | England | December 1957 | 12 High Garth, Esher, Surrey, KT10 9DN |
| JAIN, Raj Krishan, Dr RESIGNED | Director | 04 Dec 2003 | 10 Dec 2009 | England | November 1939 | 61 Upper Selsdon Road, South Croydon, Surrey, CR2 8DJ |
| JOHN, Susan Frances RESIGNED | Director | 03 Dec 2018 | 05 Dec 2024 | Wales | January 1955 | 14, Pen-Y-Dre, Rhiwbina, Cardiff, CF14 6EP, Wales |
| JOHNSON, Steven Edward RESIGNED | Director | 03 Dec 2018 | 31 Dec 2021 | United States | May 1954 | 8702, Hollow Banks Lane, Houston, Texas, United States |
| JONES, Brian Anthony RESIGNED | Director | 13 Dec 2007 | 05 Dec 2013 | United Kingdom | April 1953 | 24 Wendan Road, Newbury, Berkshire, RG14 7AE |
| JONES, Brian Anthony RESIGNED | Director | 07 Dec 1999 | 08 Dec 2005 | United Kingdom | April 1953 | 24 Wendan Road, Newbury, Berkshire, RG14 7AE |
| JONES, Brian Anthony RESIGNED | Director | 12 Dec 1991 | 04 Dec 1997 | United Kingdom | April 1953 | 24 Wendan Road, Newbury, Berkshire, RG14 7AE |
| JORDAN, Malcolm David RESIGNED | Director | 09 Dec 2010 | 13 Dec 2016 | United Kingdom | October 1941 | 4, St. Andrews Walk, Cobham, Surrey, KT11 3EQ, United Kingdom |
| KIEFT, Timothy Graham RESIGNED | Director | 04 Dec 2003 | 07 Dec 2004 | | July 1950 | Fairfields New Lane Hill, Tilehurst, Reading, West Berkshire, RG30 4JN |
| KIEFT, Timothy Graham RESIGNED | Director | 05 Dec 1996 | 31 Jan 2001 | | July 1950 | Fairfields New Lane Hill, Tilehurst, Reading, West Berkshire, RG30 4JN |
| KIRKLEY, David William, Dr RESIGNED | Director | 14 Apr 2016 | 31 Dec 2021 | Britain | July 1938 | Hqs Wellington, Victoria Embankment, London, WC2R 2PN, England |
| KIRKLEY, David William, Dr RESIGNED | Director | 10 Dec 1992 | 10 Dec 1998 | Britain | July 1938 | 76 Eaton Drive, Kingston Upon Thames, Surrey, KT2 7QX |
| KNIGHT, Francis Iles, Dr RESIGNED | Director | 10 Dec 2002 | 11 Dec 2008 | | May 1951 | 78 Erlanger Road, New Cross, London, SE14 5TH |
| KNIGHT, Francis Iles, Dr RESIGNED | Director | 07 Dec 1993 | 07 Dec 1999 | | May 1951 | 78 Erlanger Road, New Cross, London, SE14 5TH |
| KNIGHT, Iain Stafford RESIGNED | Director | 11 Dec 2017 | 07 Dec 2023 | England | April 1969 | 102, Brentford Park House, Clayponds Lane, Brentford, TW8 0GT, United Kingdom |
| LAFFERTY, Cyril RESIGNED | Director | | 10 Dec 1992 | | March 1938 | Ferndale Pembroke Road, Woking, Surrey, GU22 7DY |
| LARMINIE, Ferdinand Geoffrey RESIGNED | Director | | 07 Dec 1995 | | June 1929 | 14 Lane End, Lanesend, Tring, Herts, HP23 6LF |
| LAUGHTON, Anthony Seymour, Sir RESIGNED | Director | 07 Dec 1995 | 06 Dec 2001 | | April 1927 | Okelands Pickhurst Road, Chiddingfold, Surrey, GU8 4TS |
| LAUGHTON, Anthony Seymour, Sir RESIGNED | Director | | 10 Dec 1992 | | April 1927 | Okelands Pickhurst Road, Chiddingfold, Surrey, GU8 4TS |
| LEECE, Michael Jeffrey RESIGNED | Director | 08 Dec 2005 | 01 Dec 2011 | United Kingdom | August 1945 | Southwood, Crapstone, Yelverton, Devon, PL20 7PW |
| LIDDLE, David RESIGNED | Director | 12 Dec 1991 | 04 Dec 1997 | United Kingdom | November 1952 | Linaire Pitblain, Daviot, Inverurie, Aberdeenshire, AB51 0JB |