| PILSWORTH, Hannah Frances ACTIVE | Secretary | 06 Mar 2025 | | | | Wsp House, 70 Chancery Lane, London, WC2A 1AF |
| BARNARD, Miles Lawrence ACTIVE | Director | 01 Mar 2017 | | England | May 1966 | Wsp House, 70 Chancery Lane, London, WC2A 1AF |
| SEWELL, Karen Anne ACTIVE | Director | 16 Dec 2024 | | England | December 1975 | Wsp House, 70 Chancery Lane, London, WC2A 1AF |
| BISSET, Graham Ferguson RESIGNED | Secretary | 30 Aug 2005 | 31 Dec 2013 | | | Wsp House, 70 Chancery Lane, London, WC2A 1AF |
| FRASER, Andrew William Campbell RESIGNED | Secretary | 09 Nov 1993 | 14 Mar 1994 | | | 18 Pilgrim Close, Park Street, St Albans, Hertfordshire, AL2 2JD |
| PARTRIDGE, Sally RESIGNED | Secretary | 31 Jan 2016 | 15 Dec 2016 | | | Wsp House, 70 Chancery Lane, London, WC2A 1AF |
| PAUL, Malcolm Stephen RESIGNED | Secretary | 14 Mar 1994 | 30 Aug 2005 | | | Kimberley 4 Grove Shaw, Kingswood Court, Tadworth, Surrey, KT20 6QL |
| PHILLIPS, Mark RESIGNED | Secretary | | 05 Nov 1993 | | | 20 The Chase, Crawley, West Sussex, RH10 6HW |
| SEWELL, Karen Anne RESIGNED | Secretary | 15 Dec 2016 | 06 Mar 2025 | | | Wsp House, 70 Chancery Lane, London, WC2A 1AF |
| WESTON, Nikolas William RESIGNED | Secretary | 01 Oct 2015 | 31 Jan 2016 | | | Wsp House, 70 Chancery Lane, London, WC2A 1AF |
| AKESSON, Jan Gunnar RESIGNED | Director | 29 May 2001 | 30 Sep 2003 | | May 1964 | Mariatorget 7, Se118 48 Stockholm, FOREIGN, Sweden |
| APPLEGREN, Rikard RESIGNED | Director | 01 Jun 2010 | 30 Nov 2012 | Sweden | August 1965 | Wsp House, 70 Chancery Lane, London, WC2A 1AF |
| BARLOW, Ian Edward RESIGNED | Director | 01 Sep 2011 | 01 Aug 2012 | England | September 1951 | Wsp House, 70 Chancery Lane, London, WC2A 1AF |
| BROWN, Caroline Anne, Dr RESIGNED | Director | 01 Jul 2003 | 31 Dec 2005 | United Kingdom | June 1962 | 5, Avenue Road, Bishop's Stortford, Hertfordshire, CM23 5NS, United Kingdom |
| BYLES, Peter Scott RESIGNED | Director | | 05 Nov 1993 | | January 1947 | 11 Westfield Grove, Gosforth, Newcastle Upon Tyne, NE3 4YA |
| CASSONI, Maria Luisa RESIGNED | Director | 01 Jan 2006 | 21 Jun 2010 | England | December 1951 | 125 Providence Square, Bermondsey Wall West, London, SE1 2ED |
| COLE, Christopher RESIGNED | Director | | 20 Oct 2014 | England | August 1946 | Wsp House, 70 Chancery Lane, London, WC2A 1AF |
| CURLEY, Graham RESIGNED | Director | | 05 Nov 1993 | United Kingdom | March 1942 | 12 Dove House Green, Weybridge, Surrey, KT13 9NE |
| DAVIES, David Huw RESIGNED | Director | 01 Jan 2011 | 01 Aug 2012 | United Kingdom | February 1956 | Wsp House, 70 Chancery Lane, London, WC2A 1AF |
| DOLLIN, Paul Kenneth Edward RESIGNED | Director | 01 Jun 2010 | 17 Dec 2020 | United Kingdom | March 1971 | Wsp House, 70 Chancery Lane, London, WC2A 1AF |
| ERSEUS, Thomas Erik Torsten RESIGNED | Director | 29 May 2001 | 31 Aug 2006 | | December 1963 | Salthomsgatan 36 A, Se426 76, Vastra Frolunda, Sweden |
| FORD, Brian RESIGNED | Director | 09 Nov 1993 | 30 Apr 1997 | | February 1937 | Grange Cote Kildwick Grange, Kildwick, Keighley, West Yorkshire, BD20 9AD |
| GILL, Peter Richard RESIGNED | Director | 02 Mar 2009 | 31 Oct 2012 | United Kingdom | October 1955 | Wsp House, 70 Chancery Lane, London, WC2A 1AF |
| HAYWARD, Anthony Brian RESIGNED | Director | | 05 Nov 1993 | | August 1936 | Westway School Lane, Barrow Gurney, Bristol, Avon, BS19 3RZ |
| JENKINS, Derek Arthur RESIGNED | Director | | 05 Nov 1993 | England | July 1946 | Fairfield 149 Welcomes Road, Kenley, Surrey, CR8 5HB |
| KARLSSON, Anders Carl Ingvar RESIGNED | Director | 01 Jan 2009 | 01 Aug 2012 | France | October 1950 | Wsp House, 70 Chancery Lane, London, WC2A 1AF |
| MCLACHLAN, Stuart James RESIGNED | Director | 01 Jan 2006 | 24 Sep 2012 | United Kingdom | August 1967 | Wsp House, 70 Chancery Lane, London, WC2A 1AF |
| NAYSMITH, Mark William RESIGNED | Director | 17 Dec 2020 | 16 Dec 2024 | Scotland | December 1966 | Wsp House, 70 Chancery Lane, London, WC2A 1AF |
| NOBLE, Andrew Christopher John RESIGNED | Director | 20 Oct 2014 | 02 Mar 2017 | United Kingdom | December 1961 | Wsp House, 70 Chancery Lane, London, WC2A 1AF |
| PAUL, Malcolm Stephen RESIGNED | Director | | 06 May 2009 | United Kingdom | August 1951 | Henmead Hall, Staplefield Road, Cuckfield, Haywards Heath, West Sussex, RH17 5HY, United Kingdom |
| PHILLIPS, Mark RESIGNED | Director | | 01 Sep 1992 | | February 1941 | 20 The Chase, Crawley, West Sussex, RH10 6HW |
| ROLLINS, Mark RESIGNED | Director | 01 Jan 2006 | 01 Aug 2012 | England | August 1962 | Wsp House, 70 Chancery Lane, London, WC2A 1AF |
| SHEAVILLS, Ernest Michael RESIGNED | Director | 01 Jan 2006 | 31 Dec 2008 | | June 1945 | Coombe House, 8 Westgarth Avenue, Colinton, Edinburgh, EH13 0BD |
| STEPHENS, Christopher Berkeley RESIGNED | Director | 01 Jan 2003 | 01 Aug 2012 | United Kingdom | April 1948 | Wsp House, 70 Chancery Lane, London, WC2A 1AF |
| TETLEY, Andrew David Rycroft RESIGNED | Director | 07 Apr 1997 | 31 Dec 1998 | | January 1946 | 25 Ridgeway, Epsom, Surrey, KT19 8LD |
| THORNE, Anthony David RESIGNED | Director | 01 Jan 2011 | 22 Feb 2011 | United Kingdom | August 1950 | Wsp House, 70 Chancery Lane, London, WC2A 1AF |
| TURNER, David John RESIGNED | Director | 01 Jul 1997 | 01 Sep 2011 | England | December 1936 | Swallows Barn, Boxhill Farm Barns, Old Reigate Road, Dorking, Surrey, RH4 1NS |
| WATTS, Edward RESIGNED | Director | 01 Jul 1993 | 27 Mar 2002 | | March 1940 | 37 Langton Way, London, SE3 7TJ |
| WELCH, Peter John RESIGNED | Director | 01 Mar 1995 | 31 Dec 1998 | United Kingdom | April 1951 | Ploughmans, Mill Hill, Edenbridge, Kent, TN8 5DD |
| WELCH, Peter John RESIGNED | Director | 09 Nov 1993 | 10 Jan 2003 | | January 1940 | Frankfield Spinfield Lane, Marlow, Buckinghamshire, SL7 2LB |
| WELCH, Peter John RESIGNED | Director | | 05 Nov 1993 | | April 1951 | Plowmans Mead Road, Mill Hill, Edenbridge, Kent, TN8 5DB |
| WILLIAMS, Geoffrey William RESIGNED | Director | | 05 Nov 1993 | | June 1928 | Overhills, North Down Road, Woldingham, Surrey, CR3 7BB |
| WYATT, Martin John RESIGNED | Director | 09 Nov 1993 | 14 Mar 1994 | | March 1950 | 11 Willowside, London Colney, St Albans, Hertfordshire, AL2 1DP |