| PRISM COSEC LIMITED ACTIVE | Secretary | 20 Aug 2018 | | | | Highdown House, Yeoman Way, Worthing, West Sussex, BN99 3HH, United Kingdom |
| FRANCIS, Timothy Perry ACTIVE | Director | 01 Jan 2021 | | United States | December 1976 | Valmont Industries, Inc., 15000 Valmont Plaza, Omaha, Nebraska, 68154, United States |
| MASSEY, Roger Andrew ACTIVE | Director | 11 Feb 2011 | | United States | July 1969 | Valmont Industries, Inc., 15000 Valmont Plaza, Omaha, Nebraska, 68154, United States |
| ASHDOWN, Hannah RESIGNED | Secretary | 05 Jan 2001 | 17 Jul 2001 | | | 9 Gate Cottages, Old Common Road, Chorleywood, Hertfordshire, WD3 5LW |
| BUNYAN, Andrew John Paul RESIGNED | Secretary | 31 Jul 2003 | 30 Sep 2005 | | | 29 Dudley Gardens, Harrow, Middlesex, HA2 0DQ |
| LEE, Tony RESIGNED | Secretary | 31 Dec 1999 | 05 Jan 2001 | | | 8 Rossdale, Tunbridge Wells, Kent, TN2 3PG |
| MORGAN, Sarah RESIGNED | Secretary | 17 Jul 2001 | 31 Jul 2003 | | | 59 Barnhurst Path, South Oxhey, Hertfordshire, WD19 6UE |
| PALFREEMAN, Anthony William Hodsman RESIGNED | Secretary | | 31 Dec 1999 | | | 23 Denner Road, Chingford, London, E4 7SQ |
| DAVID VENUS & COMPANY LLP RESIGNED | Secretary | 30 Sep 2010 | 20 Aug 2018 | | | 42-50, Hersham Road, Walton-On-Thames, Surrey, KT12 1RZ, United Kingdom |
| DELTA (DCC) LIMITED RESIGNED | Secretary | 30 Sep 2005 | 30 Sep 2010 | | | Bridewell Gate, 9 Bridewll Place, London, EC4V 6AW |
| BOURNE, Peter Alfred Charles RESIGNED | Director | | 31 Mar 1999 | | March 1936 | 171 Hurst Road, Sidcup, Kent, DA15 9AH |
| BUNYAN, Andrew John Paul RESIGNED | Director | 17 Mar 2005 | 30 Sep 2005 | | September 1970 | 29 Dudley Gardens, Harrow, Middlesex, HA2 0DQ |
| FORD, Janet Anne RESIGNED | Director | 31 Dec 1999 | 17 Mar 2005 | United Kingdom | February 1957 | 40 Princes Gardens, West Acton, London, W3 0LG |
| GOWEN, Robert William RESIGNED | Director | 12 Jul 2010 | 11 Feb 2011 | England | September 1971 | Bridewell Gate, 9 Bridewell Place, London, EC4V 6AW, England |
| HOWLETT, Michael John RESIGNED | Director | 01 Apr 1999 | 31 Dec 1999 | | November 1950 | 35 Harwater Drive, Loughton, Essex, IG10 1LP |
| JAKSICH, Mark Charles RESIGNED | Director | 11 Feb 2011 | 31 Dec 2020 | United States | September 1957 | Valmont, One Valmont Plaza, 13815 First National Bank Parkway, Omaha, Nebraska, 68154-5215, United States |
| KEMPSTER, Jonathan RESIGNED | Director | 30 Oct 2007 | 12 Jul 2010 | England | January 1963 | Glaston Hill Lodge, Church Road, Eversley, Hampshire, RG27 0PX |
| LUTON, Mark RESIGNED | Director | 17 Mar 2005 | 30 Oct 2007 | | August 1970 | 52 Beechwood Avenue, Farnborough, Kent, BR6 7EY |
| MARRIOTT, Paul Roger RESIGNED | Director | 17 Mar 2005 | 31 Mar 2008 | United Kingdom | March 1968 | 37 Park Road, Radlett, Hertfordshire, WD7 8EG |
| NARCISO, John Peter RESIGNED | Director | 31 Dec 1999 | 17 Mar 2005 | | November 1947 | 52 Wood Dale, Great Baddow, Chelmsford, Essex, CM2 8EZ |
| PALFREEMAN, Anthony William Hodsman RESIGNED | Director | | 31 Dec 1999 | | August 1937 | 23 Denner Road, Chingford, London, E4 7SQ |
| PRITCHARD, Neil Bartley RESIGNED | Director | 31 Mar 2008 | 11 Aug 2008 | England | December 1971 | 80, Park Road, New Barnet, Herts, EN4 9QF, Uk |
| SMALLEY, Robert Anthony RESIGNED | Director | 11 Aug 2008 | 11 Feb 2011 | England | January 1976 | 1, Carlbury Close, St Albans, Herts, AL1 5DR, Uk |