National Grid Plc owns and operates regulated electricity and gas infrastructure networks. Its segments include transmission, gas distribution, electricity distribution and generation and non-regulated businesses. The transmission segment engages in electricity transmission, electricity system operations, gas transmission, gas system operations, French interconnector and LNG storage. The gas distribution segment operates gas distribution networks. The electricity distribution & generation segment is responsible for building, operating and maintaining of electricity distribution networks, and also maintain and operate the electricity transmission and distribution system. The non-regulated businesses segment's activities include metering, grain LNG, UK property, britned, xoserve, US non-regulated businesses, fulcrum, blue-NG, corporate activities and shared services function. The company was founded in 1990 and is headquartered in London, the United Kingdom.