The gas distribution business in Britain has been restructured by dividing the once natural monopoly operation owned by National Grid (NG) into eight regional distribution networks.
The consortium which owns Northern Gas Networks Limited was successful in acquiring the North of England Distribution Network (DN) and took over the control of the assets on 1 June, 2005.
The network area extends south from the Scottish border to South Yorkshire and has coastlines on both the east and west sides of the region.
It contains a mixture of large cities such as Newcastle, Sunderland, Leeds, Hull and Bradford and a significant rural area including North Yorkshire and Cumbria. The area covers around 6.7 million inhabitants and has approximately 2.6 million customers.
The network has an extensive distribution system comprising 36,000 kilometres of distribution gas mains, it is supplied from 23 offtakes from the National Transmission System.