The project consists of three main elements:

Replace and rebuild the existing substation by extending onto an adjacent field and reconfigure the short sections of the overhead lines into the extended substation

Add new conductors (the wires between the pylons) onto 8km of existing pylons between the Harker substation and the Scottish Border.

Refurbish existing pylons between the Harker substation and the Scottish Border byrenewing the existing wires and carrying out associated works.

Our plans allow us to provide the improvements required to maintain the existing electricity transmission system. They will also ensure the substation is prepared for future demand so it can continue to serve as a critical point of intersection on the UK energy network, connecting supplies between Scotland to England. This work is part of National Grid’s contribution to the Government’s target to achieve net zero carbon emissions by 2050.