We own and operate the electricity transmission network in England and Wales, with day-to-day responsibility for balancing supply and demand. We also operate, but do not own, the Scottish networks. Our business areas play a vital role in connecting millions of people to the energy they use, while continually seeking ways to make the energy system cleaner. National Grid Ventures and National Grid Partners also enable innovations to help revolutionise and decarbonise the future of energy.
Our networks comprise approximately 7,200 kilometres (4,474 miles) of overhead line, 1,500 kilometres (932 miles) of underground cable and 342 substations.
Other UK activities mainly relate to businesses operating in competitive markets outside of our core regulated businesses; including interconnectors and a liquefied natural gas (LNG) importation terminal – all of which are now part of National Grid Ventures. National Grid Property is responsible for the management, clean-up and disposal of surplus sites in the UK. Most of these are former gas works.