National Grid worker with various pieces of equipment in the foreground and background

UK principal operations

We have a unique position at the heart of Britain’s energy system, connecting people to the energy they use, safely. We keep the lights on and the gas flowing, so people can go about their daily lives – in their homes, their communities and workplaces, right across the nation.

We’re at the centre of one of the greatest challenges facing our society – delivering clean, affordable and reliable energy to support our world long into the future. Our unique role within Britain’s energy system has given us considerable insight and understanding of the evolving challenges and opportunities. Through this role, we’re also able to bring people and organisations together to collaborate and develop solutions – to shape the energy systems of the future.

Overview of our UK operations

Electricity transmission

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 networks comprise approximately 7,200 kilometres (4,474 miles) of overhead line, 1,500 kilometres (932 miles) of underground cable and 342 substations. 

Go to the ET website 

Gas transmission

We own and operate the gas National Transmission System in Great Britain, with day-to-day responsibility for balancing supply and demand. Our network comprises approximately 7,660 kilometres (4,760 miles) of high-pressure pipe and 618 above-ground installations.

Go to the Gas website 

System operation

As Great Britain’s System Operator (SO) we make sure gas and electricity is transported safely and efficiently from where it is produced to where it is consumed. We seek to ensure that supply and demand are balanced in real time, second-by-second, and we facilitate the connection of assets to the transmission system. 

Go to the Electricity System Operator website

Other commercial activities

Other UK activities mainly relate to businesses operating in competitive markets outside of our core regulated businesses; including interconnectors, gas metering activities 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. You can learn more by reading our tackling the housing crisis case study.

National Grid worker fixed to electricity mast to gain access to cables

US principal operations

Electricity, natural gas, and clean energy delivery across the north eastern United States.

Find out more