| WALKER, Laura ACTIVE | Secretary | 01 Jul 2025 | | | | 60, Petty France, London, SW1H 9EU, England |
| BLAIR, Stephen ACTIVE | Director | 07 Jun 2023 | | England | November 1959 | 60, Petty France, London, SW1H 9EU, England |
| BRUBAKER, Lynn ACTIVE | Director | 01 Jul 2023 | | United States | October 1957 | 60, Petty France, London, SW1H 9EU, England |
| FRYER, Mark Rupert Maxwell ACTIVE | Director | 06 Jan 2025 | | England | April 1967 | 60, Petty France, London, SW1H 9EU, England |
| JOHNSON, Neil Anthony ACTIVE | Director | 17 May 2023 | | England | April 1949 | 60, Petty France, London, SW1H 9EU, England |
| LINCOLN, John Roderick, Dr ACTIVE | Director | 01 Aug 2024 | | England | September 1967 | 60, Petty France, London, SW1H 9EU, England |
| LINGWOOD, Nigel Peter ACTIVE | Director | 01 Nov 2022 | | England | March 1959 | 60, Petty France, London, SW1H 9EU, England |
| ALLAN, Richard Friend RESIGNED | Secretary | 20 Mar 2019 | 01 Jul 2025 | | | 60, Petty France, London, SW1H 9EU, England |
| ANDREWS, John Beresford RESIGNED | Secretary | | 28 Apr 1999 | | | Lynbere Apple Grove Ashfield Road, Wetherden, Stowmarket, Suffolk, IP14 3LY |
| BUCKLEY, Cathryn Ann RESIGNED | Secretary | 28 Apr 1999 | 21 Sep 2009 | | | 38 Calder Close, Droitwich, Worcestershire, WR9 8DU |
| FUSSELL, Christopher Mark RESIGNED | Secretary | 06 Jun 2016 | 06 Nov 2018 | | | Leaf C, Level 36, Tower 42, 25 Old Broad Street, London, EC2N 1HQ, England |
| GILES, Nicholas David Martin RESIGNED | Secretary | 21 Sep 2009 | 29 Feb 2016 | | | Dialight Plc, Exning Road, Newmarket, Suffolk, CB8 0AX, England |
| KHANBABI, Fariyal RESIGNED | Secretary | 01 Mar 2016 | 05 Jun 2016 | | | Leaf C, Level 36, Tower 42, 25 Old Broad Street, London, EC2N 1HQ, England |
| SHEEHY, Ronan Michael RESIGNED | Secretary | 23 Nov 2018 | 20 Mar 2019 | | | Leaf C, Level 36, Tower 42, 25 Old Broad Street, London, EC2N 1HQ, England |
| BIRD, Stephen Clive RESIGNED | Director | 10 Jan 2013 | 10 Sep 2021 | United Kingdom | September 1960 | Leaf C, Level 36, Tower 42, 25 Old Broad Street, London, EC2N 1HQ, England |
| BLOOD, David Wayland RESIGNED | Director | 01 Jul 2015 | 30 Mar 2023 | England | April 1959 | Leaf C, Level 36, Tower 42, 25 Old Broad Street, London, EC2N 1HQ, England |
| BUCKLEY, Cathryn Ann RESIGNED | Director | 29 Sep 2005 | 17 Dec 2009 | United Kingdom | January 1963 | 38 Calder Close, Droitwich, Worcestershire, WR9 8DU |
| BURTON, Roy Thomas RESIGNED | Director | 29 Sep 2005 | 02 Mar 2015 | Usa | June 1947 | Dialight Plc, Exning Road, Newmarket, Suffolk, CB8 0AX, England |
| BURY, Lindsay Claude Neils RESIGNED | Director | 16 Sep 1993 | 25 Apr 2001 | United Kingdom | February 1939 | Millichope Park, Munslow, Craven Arms, Shropshire, SY7 9HA |
| CHIANG, Wai Kuen RESIGNED | Director | 01 Oct 2020 | 19 May 2021 | England | December 1968 | Leaf C, Level 36, Tower 42, 25 Old Broad Street, London, EC2N 1HQ, England |
| COCKSHAW, Alan, Sir RESIGNED | Director | 01 Oct 1997 | 29 Sep 2005 | United Kingdom | July 1937 | Red Hill House 280 Leigh Road, Worsley, Manchester, M28 1LH |
| CURRY, Peter Alfred Max RESIGNED | Director | 13 Feb 1997 | 23 Apr 2003 | United Kingdom | August 1930 | The Old Vicarage Valley End, Chobham, Woking, Surrey, GU24 8TB |
| EDMUNDS, Wayne RESIGNED | Director | 25 Jan 2016 | 05 Aug 2019 | England | February 1956 | Leaf C, Level 36, Tower 42, 25 Old Broad Street, London, EC2N 1HQ, England |
| FRYER, Mark Rupert Maxwell RESIGNED | Director | 31 Aug 2010 | 15 Jan 2014 | England | April 1967 | Dialight Plc, Exning Road, Newmarket, Suffolk, CB8 0AX, England |
| GOOD, Steve Paul RESIGNED | Director | 01 Jun 2018 | 31 Mar 2020 | England | March 1961 | Leaf C, Level 36, Tower 42, 25 Old Broad Street, London, EC2N 1HQ, England |
| GRAHAM, Tracey RESIGNED | Director | 10 Jan 2013 | 26 Apr 2016 | England | July 1965 | Dialight Plc, Exning Road, Newmarket, Suffolk, CB8 0AX, England |
| HAUG, Gotthard RESIGNED | Director | 01 Apr 2020 | 30 Jun 2023 | Belgium | December 1958 | Leaf C, Level 36, Tower 42, 25 Old Broad Street, London, EC2N 1HQ, England |
| HEWITT, Jeffrey Lindsey RESIGNED | Director | 11 Sep 2001 | 31 Aug 2007 | United Kingdom | September 1947 | Palo Alto, 6 College Way, Northwood, Middlesex, HA6 2BL |
| HORNBY, Derek Peter, Sir RESIGNED | Director | 01 Oct 1993 | 13 Feb 1997 | England | January 1930 | Badgers Farm, Idlicote, Shipston On Stour, Warwickshire, CV36 5DT |
| HOTELLIER, Gaelle RESIGNED | Director | 03 Oct 2016 | 30 Jun 2023 | Germany | April 1972 | Leaf C, Level 36, Tower 42, 25 Old Broad Street, London, EC2N 1HQ, England |
| JEENS, Robert Charles Hubert RESIGNED | Director | 11 May 2001 | 25 Aug 2010 | United Kingdom | December 1953 | Dialight Plc, Exning Road, Newmarket, Suffolk, CB8 0AX, England |
| JENNINGS, Clive Adrian Roynon RESIGNED | Director | 18 Jan 2022 | 17 Sep 2023 | England | September 1960 | Leaf C, Level 36, Tower 42, 25 Old Broad Street, London, EC2N 1HQ, England |
| KHANBABI, Fariyal RESIGNED | Director | 08 Sep 2014 | 15 Feb 2024 | England | July 1967 | Leaf C, Level 36, Tower 42, 25 Old Broad Street, London, EC2N 1HQ, England |
| KOCH, Richard John RESIGNED | Director | 01 Jan 1996 | 11 Sep 2001 | | July 1950 | 4 Ennismore Mews, Knightsbridge, London, SW7 1AN |
| LAMBOURNE, Robert Ernest RESIGNED | Director | 26 May 2010 | 26 Apr 2016 | England | February 1952 | Dialight Plc, Exning Road, Newmarket, Suffolk, CB8 0AX, England |
| OLIVER, Karen Jacqueline RESIGNED | Director | 01 Apr 2020 | 31 Dec 2022 | England | December 1963 | Leaf C, Level 36, Tower 42, 25 Old Broad Street, London, EC2N 1HQ, England |
| RALPH, George Alexander RESIGNED | Director | 17 Dec 2009 | 28 Sep 2010 | England | October 1958 | Dialight Plc, Exning Road, Newmarket, Suffolk, CB8 0AX, England |
| RAPP, Martin Lee RESIGNED | Director | 26 Apr 2016 | 09 Aug 2019 | United States | May 1960 | Leaf C, Level 36, Tower 42, 25 Old Broad Street, London, EC2N 1HQ, England |
| RICKETTS, Andrew Frederick RESIGNED | Director | | 31 Aug 1996 | | October 1955 | St Andrews Lodge Church Lane, West Deeping, Peterborough, Lincolnshire, PE6 9HU |
| RONALD, William David Gordon RESIGNED | Director | 14 May 2009 | 25 Jan 2016 | England | September 1955 | Dialight Plc, Exning Road, Newmarket, Suffolk, CB8 0AX, England |
| RYAN, James Anthony RESIGNED | Director | | 31 Jan 1992 | | December 1946 | Ashtree House 56 Long Road, Comberton, Cambridgeshire, CB3 7DG |
| SMITHAM, Peter RESIGNED | Director | | 05 Jan 1998 | | May 1942 | Flat 1, 11 Cheval Place, London, SW7 1EW |
| ST CYR, Roger RESIGNED | Director | | 18 Oct 1994 | | September 1942 | 7004 Boulevard East, Apartment 15l, Guttenberg, New Jersey, CHANNEL, Usa |
| STUCKES, Richard Paul RESIGNED | Director | 14 May 2009 | 30 Jun 2015 | United Kingdom | November 1967 | Dialight Plc, Exning Road, Newmarket, Suffolk, CB8 0AX, England |
| SUTSKO, Michael George RESIGNED | Director | 01 Jun 2015 | 08 Jan 2018 | Usa | February 1969 | Leaf C, Level 36, Tower 42, 25 Old Broad Street, London, EC2N 1HQ, England |
| TEE, Henry Leonard RESIGNED | Director | | 12 Sep 2012 | United Kingdom | October 1945 | Dialight Plc, Exning Road, Newmarket, Suffolk, CB8 0AX, England |
| TEMPEST, Philip Anthony RESIGNED | Director | 20 May 1994 | 13 Feb 1997 | | June 1949 | Field House, Kirton, Ipswich, Suffolk, IP10 0PZ |
| THOMAS, David Jeremy RESIGNED | Director | 26 Apr 2016 | 16 May 2023 | United Kingdom | May 1954 | Leaf C, Level 36, Tower 42, 25 Old Broad Street, London, EC2N 1HQ, England |
| TIMMS, Peter Charles RESIGNED | Director | 01 Jan 1996 | 18 Nov 1996 | | June 1948 | 310 Passaic Avenue, Spring Lake, NJ07762, Usa |
| VAISEY, Alfred John RESIGNED | Director | 01 Aug 1996 | 29 Sep 2005 | | November 1953 | Royse House 4 Royse Grove, Royston, Hertfordshire, SG8 9EP |
| WHITELEY, William Henry RESIGNED | Director | 11 Sep 2001 | 13 May 2009 | England | October 1948 | Hill Farm, Hinton Charterhouse, Bath, Avon, BA3 6AE |
| ZHANG, Xiaofeng RESIGNED | Director | 01 Feb 2024 | 11 Nov 2024 | United States | January 1972 | 60, Petty France, London, SW1H 9EU, England |