Britain’s high voltage supergrid was energised for the first time in July 1953, marking a new era in the way that electricity powered our country. Discover the technology, people and places behind the early supergrid, and how it’s still evolving into a network fit for a net zero future.

The supergrid at 70

Discover some of the major network investments that have evolved our transmission system since the supergrid was first switched on.

Find out more

Technology of the early supergrid

In the summer of 1953 a circuit-breaker was closed to energise Britain’s 275kV supergrid for the first time. Read on to discover some of the technology behind the achievement.

Find out more

Where the supergrid began

Near a small village in Nottinghamshire, Britain’s 275kV supergrid was switched on in front of an assembled crowd. Discover the places that played host to the early supergrid.

Find out more

People power

Britain’s supergrid heralded a time of remarkable engineering prowess and innovation. Discover some of the key figures behind the progress of electricity at the time.

Find out more
Uncropped

The Great Grid Upgrade

At National Grid we’ve invested billions over recent decades to maintain and evolve our transmission network, and today we’re embarking on the Great Grid Upgrade – the biggest overhaul of the electricity grid in generations.

Find out more