National Grid PLC is an energy company. The Company provides electricity and gas to customers. It operates through three segments: UK Electricity Transmission, UK Gas Transmission and US Regulated. UK Electricity Transmission segment includes high-voltage electricity transmission networks in England and Wales and Great Britain system operator. UK Gas Transmission segment includes high-pressure gas transmission networks in Great Britain and system operator in Great Britain. US Regulated segment includes gas distribution networks, electricity distribution networks and high-voltage electricity transmission networks in New York and New England and electricity generation facilities in New York. US Regulated segment includes distribution services, transmission services and electricity generation.