Our transmission operations in the UK encompass both electricity and gas transmission, comprising the following principal activities:
Electricity transmission owner: We own the electricity transmission system in England and Wales. Our electricity assets comprise approximately 7,200 kilometres of overhead line, about 690 kilometres of underground cable and 337 substations at 241 sites.
Gas transmission owner: We own the gas national transmission system in Great Britain. This comprises approximately 7,600 kilometres of high pressure pipe and 26 compressor stations, connecting to eight distribution networks and to third party independent systems for onward transportation of gas to end consumers.
Electricity system operator: We are the Great Britain System Operator, responsible for managing the operations of both the England and Wales transmission system that we own and also the two high voltage electricity transmission networks in Scotland. Day-to-day operation of the Great Britain electricity transmission system involves the continuous real-time matching of demand and generation output, ensuring the stability and security of the power system and the maintenance of satisfactory voltage and frequency. We are also designated as system operator for the new offshore electricity transmission regime.
Gas system operator: We operate the gas national transmission system. Day-to-day operation includes balancing supply and demand, maintaining satisfactory system pressures and ensuring gas quality standards are met.
French interconnector: We own and operate the UK assets, and a portion of the subsea cables, that comprise the electricity interconnector between England and France as part of a joint arrangement with the French transmission operator.
LNG storage: We own and operate liquefied natural gas (LNG) storage facilities in Great Britain.
Transmission Customer Commitment
Contact us if you have an enquiry regarding:
Transmission Customer Services manages industry customer relationships. If you have an enquiry regarding any of the above please contact us on 01926 654634.
For further information about Transmission connections, please visit our Electricity or Gas Connections pages.
National Grid HouseWarwick Technology ParkGallows HillWarwickCV34 6DA
Call: 01926 65 3000Fax: 01926 65 4378
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