Separating the Electricity System Operator (ESO) from Electricity Transmission (ET)

On 1 April 2019 Electricity Transmission became a legally separate company within the National Grid Group.

National Grid Electricity Transmission (ET) and the Electricity System Operator (ESO) are now separate businesses, operating within the National Grid group. We want to be your trusted energy partner. Separation from ESO allows ET to offer you bespoke, competitive solutions to fit your needs.

We'll work together with you, to help you make informed choices about what is right for your business.

See our video which explains the differences between Electricity Transmission and the Electricity System Operator.

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About us

We own the high-voltage electricity transmission network in England and Wales. We’re network specialists, managing not only today’s highly complex network, but enabling the electricity system of tomorrow.

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Our network in numbers

Our network goes beyond our assets - our diverse workforce is working hard to overcome some of the biggest energy challenges of the 21st century and provide a safe, reliable and affordable service for our customers.


Contact us

If you have a question for us, want to find out where we are located or have a complaint, then you're in the right place.