| DUNCOMBE, Fiona Margaret ACTIVE | Secretary | 23 Dec 2015 | | | | 80, Fenchurch Street, London, EC3M 4BY, United Kingdom |
| DENNETT, Paul ACTIVE | Director | 07 Jun 2024 | | United Kingdom | March 1971 | 80, Fenchurch Street, London, EC3M 4BY, United Kingdom |
| HOGG, Peter William ACTIVE | Director | 01 Feb 2026 | | United Kingdom | September 1969 | 80, Fenchurch Street, London, EC3M 4BY, United Kingdom |
| MANKU, Pritpal ACTIVE | Director | 29 Oct 2025 | | United Kingdom | August 1971 | 80, Fenchurch Street, London, EC3M 4BY, United Kingdom |
| WILLIAMS, Jennifer Ann ACTIVE | Director | 06 Sep 2024 | | England | July 1969 | 80, Fenchurch Street, London, EC3M 4BY, United Kingdom |
| BRAND, Stephen Graham RESIGNED | Secretary | 29 Dec 2000 | 30 Sep 2008 | | | 40 Manor Road, Cheam, Sutton, Surrey, SM2 7AG |
| CURTIS, Richard Gregory RESIGNED | Secretary | 31 Jul 1993 | 29 Dec 2000 | | | 92 Beacons Park, Brecon, Powys, LD3 9BQ |
| DAY, Margot RESIGNED | Secretary | 15 Jul 2015 | 15 Jun 2019 | | | Arcadis House, 34 York Way, London, N1 9AB, England |
| HUNT, Neil John RESIGNED | Secretary | 30 Sep 2008 | 23 Dec 2015 | | | Manning House, 22 Carlisle Place, London, SW1P 1JA, United Kingdom |
| LAWRENCE, Jillian Louise RESIGNED | Secretary | 01 Jan 2020 | 08 Apr 2022 | | | 80, Fenchurch Street, London, EC3M 4BY, United Kingdom |
| WARWICK, Timothy James RESIGNED | Secretary | | 31 Jul 1993 | | | Plas Y Coed 3 Cwrt Y Cadno, St Fagans, Cardiff, CF5 4PJ, Wales |
| ALGHITA, Mahmoud Bakir Ahmad RESIGNED | Director | 18 Oct 2021 | 30 Jun 2024 | England | March 1963 | 80, Fenchurch Street, London, EC3M 4BY, United Kingdom |
| BELLEW, Nicholas James RESIGNED | Director | 12 Aug 2019 | 18 Oct 2021 | Wales | March 1979 | 80, Fenchurch Street, London, EC3M 4BY, United Kingdom |
| BIMPSON, Simon Timothy RESIGNED | Director | 18 Oct 2021 | 01 Dec 2022 | United Kingdom | September 1974 | 80, Fenchurch Street, London, EC3M 4BY, United Kingdom |
| BIMPSON, Simon Timothy RESIGNED | Director | 18 Oct 2021 | 01 Feb 2026 | United Kingdom | September 1974 | 80, Fenchurch Street, London, EC3M 4BY, United Kingdom |
| BROOKES, Alan Geoffrey RESIGNED | Director | 26 Feb 2015 | 01 Jan 2020 | England | November 1961 | Arcadis House, 34 York Way, London, N1 9AB, England |
| CASH, Stewart RESIGNED | Director | 07 Jun 2024 | 29 Oct 2025 | United Kingdom | January 1973 | 80, Fenchurch Street, London, EC3M 4BY, United Kingdom |
| CLARK, Anne Rosemary RESIGNED | Director | 02 Jul 2010 | 12 Aug 2019 | England | December 1964 | Arcadis House, 34 York Way, London, N1 9AB, England |
| CLARKE, Michael James RESIGNED | Director | 25 Apr 2007 | 30 Oct 2009 | England | September 1958 | 29 Bressenden Place, London, SW1E 5DZ |
| COWLARD, Mark Allan RESIGNED | Director | 21 Mar 2018 | 18 Oct 2021 | England | June 1969 | 80, Fenchurch Street, London, EC3M 4BY, United Kingdom |
| DOWN, Russell Peter RESIGNED | Director | 13 Apr 2004 | 28 Feb 2015 | Uk | May 1965 | Manning House, 22 Carlisle Place, London, SW1P 1JA, United Kingdom |
| EDWARDS, Albert Edward John RESIGNED | Director | | 31 Jul 1993 | | January 1948 | 7 Cae Rhedyn, Craig Penllyne, Cowbridge, South Glamorgan, CF7 7SA |
| EVANS, Clifford John RESIGNED | Director | | 01 Jun 1993 | | October 1928 | Mariners Way, Marine Parade, Penarth, South Glamorgan, CF65 3BE |
| HAMILTON EDDY, Simon Esmond RESIGNED | Director | 28 Jul 1992 | 29 Dec 2000 | | October 1945 | Castle Cottage, Marlborough Road, Aldbourne, Wiltshire, SN8 2DD |
| HEMPSTEAD, Neil Martin RESIGNED | Director | 13 Apr 2004 | 30 May 2008 | | December 1953 | Elban, Summerfield Hall Lane Maesycwmmer, Hengoed, Mid Glamorgan, CF82 7RG |
| JACKSON, Howard Robert RESIGNED | Director | | 28 Apr 1993 | | August 1920 | Little Parc Farm Thornhill, Llanishen, Cardiff, CF4 5UA |
| JAMES, John Mansel RESIGNED | Director | 11 Dec 1992 | 14 Mar 1995 | | June 1939 | Tesano, Van, Llanidloes, Powys, SY18 6NG |
| JONES, Colin James RESIGNED | Director | | 28 Apr 1993 | | November 1935 | Llwyncelyn 8 Church Road, Whitchurch, Cardiff, South Glamorgan, CF4 2DZ |
| JONES, Kevin RESIGNED | Director | 25 Nov 2005 | 25 Apr 2007 | | September 1954 | 1 The Grange, School Road Miskin, Pontyclun, Mid Glamorgan, CF72 8PH |
| MEEKE, Ian Barrie RESIGNED | Director | | 30 Mar 1998 | | July 1934 | 74 Stanwell Road, Penarth, South Glamorgan, CF64 3LQ |
| MORGAN, Thomas Trevor RESIGNED | Director | 18 Oct 2021 | 30 Jun 2024 | United Kingdom | January 1975 | 80, Fenchurch Street, London, EC3M 4BY, United Kingdom |
| NAYLOR, William David RESIGNED | Director | | 31 Jul 1992 | | June 1948 | 74 Westport Avenue, Mayals, Swansea, SA3 5EF |
| PROCTOR, Alan James RESIGNED | Director | 29 Sep 1993 | 19 May 1998 | Wales | January 1950 | 33 Heol Wen, Cardiff, South Glamorgan, CF14 6EG |
| REID, Graham Matthew, Mr. RESIGNED | Director | 02 Jul 2010 | 23 Dec 2015 | United Kingdom | January 1962 | Manning House, 22 Carlisle Place, London, SW1P 1JA, United Kingdom |
| STEWART, Roderick Alistair RESIGNED | Director | 14 Dec 2009 | 07 May 2010 | Uk | August 1958 | 29 Bressenden Place, London, SW1E 5DZ |
| TWAMLEY, Paul James RESIGNED | Director | 12 Oct 1992 | 11 Dec 1992 | | July 1946 | The Old Rectory, Wolvesnewton, Chepstow, Gwent, NP6 |
| TYLER, Charles Stewart RESIGNED | Director | 10 Apr 2001 | 01 Sep 2004 | | March 1944 | Orchard House Woodland View, Chilcote, Swadlincote, Derbyshire, DE12 8DP |
| WADE, Timothy RESIGNED | Director | 19 May 1998 | 29 Dec 2000 | | August 1944 | Chasewoods, Ogbourne St George, Marlborough, Wiltshire, SN8 2NR |
| WADE, Timothy RESIGNED | Director | | 14 Mar 1995 | | August 1944 | Chasewoods, Ogbourne St George, Marlborough, Wiltshire, SN8 2NR |
| WALLS, Christopher Stuart Neil RESIGNED | Director | 29 Dec 2000 | 25 Nov 2005 | United Kingdom | June 1954 | Appletrees, One Pin Lane, Farnham Common, Buckinghamshire, SL2 3RD |
| WHITTAKER, Sian RESIGNED | Director | 01 Dec 2022 | 06 Sep 2024 | United Kingdom | February 1981 | 80, Fenchurch Street, London, EC3M 4BY, United Kingdom |
| WILLIAMS, Geoffrey Wyn RESIGNED | Director | 19 Oct 2000 | 03 Nov 2000 | Wales | November 1944 | 5 Dros Y Mor, Marine Parade, Penarth, South Glamorgan, CF64 3BA |