A Aykley Heads B Billingham Birtley Bishop Auckland Blackhall Colliery C Chester le Street Consett Cowpen Lane Industrial Estate Coxhoe D Darlington Dipton Durham F Ferryhill G Garmondsway H Hartlepool L Langley Moor N Newfield Newton Aycliffe P Peterlee Preston Farm Industrial Estate Q Quarrington Hill S Shotton Colliery Spennymoor Stanley Stockton-on-Tees T Tanfield Lea W Wingate Recently updated companies Most viewed companies