| FILTERS, DRAINS & CHANNELS | ||
| Cooper Clarke Group Ltd Bloomfield Road, Farnworth, Bolton, Lancashire Specialist products for the protection of buildings from the ingress of ground gas using membranes and passive/active venting, gas monitoring, vented cut-off trenches, landfill lining and containment. | ||
| Earth Products Ltd Fearnought Works, Huddersfield Road Holmfirth, Batley, W. Yorkshire HD7 2TT, U.K. Preformed sub soil and highway edge drains | ||
| Naylor Drainage Ltd Clough Green, Cawthorne, Barnsley, S. Yorkshire S75 4AD, U.K. Drainage materials and products | ||
| Polypipe plc Broomhouse Lane, Edlington, Doncaster, S. Yorkshire DN12 1ES, U.K. Drainage materials and products; Pipes and ducting | ||