| RUDDER, Jennifer Lynn ACTIVE | Director | 24 Jul 2025 | | England | January 1973 | Bucknalls Lane, Bucknalls Lane, Watford, Herts, WD25 9XX, England |
| SHAPIRO, Ian David ACTIVE | Director | 09 Sep 2025 | | England | May 1974 | Bucknalls Lane, Bucknalls Lane, Watford, Herts, WD25 9XX, England |
| HORAN, James Francis RESIGNED | Secretary | 31 Mar 2000 | 26 Sep 2008 | | | 1 Westmoreland Place, Ealing, London, W5 1QE |
| LEATHERS, John Walter RESIGNED | Secretary | | 08 Apr 1996 | | | 31 Long Grove, Harold Wood, Romford, Essex, RM3 0WN |
| LUPTON, David Lloyd RESIGNED | Secretary | 08 Apr 1996 | 31 Mar 2000 | | | 13 Beech Hill Road, Sunningdale, Ascot, Berkshire, SL5 0BN |
| BRAINCH, Jatinder Kaur RESIGNED | Director | 01 Oct 2017 | 31 Jan 2018 | England | March 1974 | Building Research Establishment Ltd, Bucknalls Lane, Watford, WD25 9XX, England |
| CARTER, John Gordon Thomas, Sir RESIGNED | Director | | 11 Mar 1994 | England | December 1937 | 42 Wolsey Road, Moor Park, Northwood, Middlesex, HA6 2EN |
| CHARLESWORTH, Gillian Mary RESIGNED | Director | 07 Nov 2024 | 09 Sep 2025 | England | December 1961 | Bucknalls Lane, Bucknalls Lane, Watford, Herts, WD25 9XX, England |
| FOREMAN, Peter Francis RESIGNED | Director | | 19 Nov 1996 | | March 1943 | 71 Fenchurch Street, London, EC3M 4BS |
| HERBERT, Andrew Charles RESIGNED | Director | 24 Mar 2020 | 17 Jan 2023 | England | October 1962 | Bucknalls Lane, Bucknalls Lane, Watford, Herts, WD25 9XX, England |
| HEUSCH, Russell RESIGNED | Director | 22 Sep 2008 | 24 Feb 2016 | United Kingdom | June 1960 | 58, Tenby Avenue, Harrow, Middlesex, HA3 8RX |
| HORAN, James Francis RESIGNED | Director | 31 Mar 2000 | 26 Sep 2008 | United Kingdom | July 1952 | 1 Westmoreland Place, Ealing, London, W5 1QE |
| MILLS, Albert Gordon RESIGNED | Director | | 31 Mar 2000 | | September 1943 | Rossacre, Church Lane Wicklewood Wymondham, Norwich, Norfolk, NR18 9QH |
| SHARMAN, Peter John RESIGNED | Director | 18 Nov 1993 | 31 Jan 1997 | United Kingdom | July 1944 | Townsend Farm Bulkeley Hall Lane, Bulkeley, Malpas, Cheshire, SY14 8BA |
| SINCLAIR, John RESIGNED | Director | 17 Dec 1992 | 10 Nov 1994 | United Kingdom | January 1948 | 75 Nelson Road, Rayleigh, Essex, SS6 8HQ |
| TANNER, Anthony Richard RESIGNED | Director | 09 Apr 2019 | 24 Mar 2020 | Scotland | April 1963 | Bucknalls Lane, Bucknalls Lane, Watford, Herts, WD25 9XX, England |
| THOMPSON, Alan RESIGNED | Director | 10 Nov 1994 | 04 Dec 1996 | | May 1940 | 48 Blunts Wood Road, Haywards Heath, West Sussex, RH16 1NB |
| TRAFFORD, Niall Gerard RESIGNED | Director | 24 Feb 2016 | 09 Apr 2019 | England | March 1962 | Bucknalls Lane, Bucknalls Lane, Watford, Herts, WD25 9XX, England |
| TREEN, William Raymond RESIGNED | Director | 19 Nov 1996 | 31 Mar 2000 | England | October 1940 | 38 Sheldon Avenue, Highgate, London, N6 4JR |
| WIJERATNE, Vinodha Soysa RESIGNED | Director | 24 Jan 2023 | 07 Nov 2024 | Wales | October 1965 | Bucknalls Lane, Bucknalls Lane, Watford, Herts, WD25 9XX, England |
| WRIGHT, Norman Donald Picken RESIGNED | Director | | 18 Nov 1993 | | August 1920 | Blue Hills 15 Oxshott Rise, Cobham, Surrey, KT11 2RW |
| WYATT, Martin John, Dr RESIGNED | Director | 31 Mar 2000 | 01 Jan 2014 | England | March 1950 | The Birches, School Lane, Essendon, Hertfordshire, AL9 6HD |