Source

• National Street Gazetteer

  Offsite — Description From the [about page](http://www.thensg.org.uk/iansg/link.htm?id=100): > The National Street Gazetteer (NSG) is the definitive reference system used in the notification process and the coordination of street works. Under legislation, each local highway authority in England and Wales is required to create and maintain its own Local Street Gazetteer (LSG) ...