| 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 |
| FAIRBROTHER, Richard RESIGNED | Secretary | 31 Oct 1997 | 12 Dec 1998 | | | 68 Edinburgh Gardens, Claydon, Ipswich, Suffolk, IP6 0DU |
| HARRISON, Irene Lesley RESIGNED | Nominee Secretary | 19 Feb 1992 | 06 Jan 1992 | | | Fy Mwthin, 22 Merthyr Road Tongwynlais, Cardiff, South Glamorgan, CF15 7LH |
| HARRISON, Irene Lesley RESIGNED | Nominee Secretary | 29 Nov 1991 | 06 Jan 1992 | | | Fy Mwthin, 22 Merthyr Road Tongwynlais, Cardiff, South Glamorgan, CF15 7LH |
| LEE, Tony RESIGNED | Secretary | 17 Aug 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 |
| STASS, Keith Albert Trevor RESIGNED | Secretary | 26 Feb 1992 | 31 Oct 1997 | | | The White Lodge, High Park, Droitwich, Worcestershire, WR9 0AG |
| WALKER, Philip Henry RESIGNED | Secretary | 12 Dec 1998 | 17 Aug 1999 | | | 9 Daisy Bank Close, Pelsall, Walsall, West Midlands, WS3 4BL |
| WHITAKER, Anne Michelle RESIGNED | Nominee Secretary | 06 Jan 1992 | 26 Feb 1992 | | | 3 Tennyson Avenue, Sutton Coldfield, West Midlands, England |
| 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 Bridewell Place, London, EC4V 6AW |
| BEARN, Alan Edward RESIGNED | Director | 26 Feb 1992 | 31 Aug 1998 | England | February 1942 | 50 Rous Road, Buckhurst Hill, Essex, IG9 6BT |
| BENSON, Kenneth RESIGNED | Director | 31 Oct 1997 | 12 Dec 1998 | | August 1944 | 95 Valley Road, Ipswich, Suffolk, IP1 4NE |
| BUNYAN, Andrew John Paul RESIGNED | Director | 17 Mar 2005 | 30 Sep 2005 | | September 1970 | 29 Dudley Gardens, Harrow, Middlesex, HA2 0DQ |
| FAIRBROTHER, Richard RESIGNED | Director | 31 Oct 1997 | 12 Dec 1998 | | December 1947 | 68 Edinburgh Gardens, Claydon, Ipswich, Suffolk, IP6 0DU |
| FINLYSON, Duncan James RESIGNED | Director | 06 Jan 1992 | 26 Feb 1992 | | March 1956 | Marlborough House, Holly Walk, Leamington Spa, CV32 4LS |
| FORD, Janet Anne RESIGNED | Director | 17 Aug 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 |
| 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 |
| JENKINS, Michael Victor RESIGNED | Director | 26 Feb 1992 | 31 Oct 1997 | United Kingdom | July 1950 | Oaklands 44 Middlefield Lane, Hagley, Stourbridge, Worcestershire, DY9 0PX |
| 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 | 17 Aug 1999 | 17 Mar 2005 | | November 1947 | 52 Wood Dale, Great Baddow, Chelmsford, Essex, CM2 8EZ |
| 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 |
| STASS, Keith Albert Trevor RESIGNED | Director | 26 Feb 1992 | 31 Oct 1997 | | April 1945 | The White Lodge, High Park, Droitwich, Worcestershire, WR9 0AG |
| VAN DER KINDERE, Michel RESIGNED | Director | 31 Oct 1997 | 17 Aug 1999 | | September 1946 | Av Lancaster 81, Brussels, B1180, Belgium |
| WOODS, Andrew Nicholas RESIGNED | Director | 31 Oct 1997 | 17 Aug 1999 | | September 1960 | 15 Albert Road, Stroud Green, London, N4 3RR |
| BUSINESS INFORMATION RESEARCH & REPORTING LIMITED RESIGNED | Nominee Director | 29 Nov 1991 | 06 Jan 1992 | | | Crown House, 64 Whitchurch Road, Cardiff, CF14 3LX |