Little Horsted

Project update

At National Grid we are at the heart of Britain’s energy system, connecting people to the energy they use, safely and reliably. We're working to build a secure, cleaner and more affordable energy system that serves everyone.

Electricity is carried from power stations, wind farms and other sources through a network of high-voltage electricity lines, owned and operated by National Grid. These electricity lines connect to hundreds of substations around the country, which then transfer electricity to local distributors, who in turn supply it at a lower voltage to local homes, schools and businesses.

We've been building a new electricity supply point (substation) near Little Horsted in East Sussex. In December 2025, we brought the new substation into operation, helping UK Power Networks supply reliable electricity to local homes and businesses and meet increasing demand.

The development ensures a continued safe and secure supply of electricity fit for the future and is part of National Grid's wider investment programme to support growth in the Southeast of England. 

Upcoming high-voltage overhead line work around Little Horsted substation will connect the second and final circuit to the network. This activity is planned between January and February 2027, with temporary preparatory work starting mid-December 2026. All site works will be complete by April 2027. This includes the commissioning of our development's supergrid transformers to energise the new UK Power Networks 132kV Lewes Substation.