Bluewater in Greenhithe is the third-largest shopping centre in the UK; it was built on the former Blue Circle Swanscombe Cement Works, which closed in 1990. South East Water is in Snodland. H+H UK (aerated concrete) is based at the A25/A227 roundabout at Ightham, south of Wrotham; to the east is Geographers' A-Z Map Company off the A227 near the railway station, near the M26.