Tarmac Northern Ltd
Hollings Hill Quarry, Consett, County Durham, DH8 9JT
Tarmac Ltd
Blaydon Quarry, Greenside Road, Blaydon-on-Tyne, Tyne And Wear, NE21 4SX
Sherburn Stone Co Ltd
Broadwood Plant, Frosterley, Bishop Auckland, County Durham, DL13 2TJ
Thompson of Prudhoe
Princess Way, Prudhoe, Northumberland, NE42 6PL