Construction starts on Scotland to England interconnector
Image courtesy SP Energy Networks
Construction in the UK has started on Eastern Green Link 1, a Scotland to England subsea interconnector that will help expand the grid to support increasing demand.
Eastern Green Link 1 – an interconnector joint venture between SP Energy Networks in Scotland and National Grid Electricity Transmission in England – will transport green electricity for two million homes.
The interconnector consists of 190km predominantly undersea cable linking the south-east of Scotland with the north-east of England.
The £2.5 billion ($3.2 billion) project was given the green light by Ofgem last year and onshore works are now underway with offshore construction due to start in the UK’s summer.
At the cable’s two landfall points, Torness in East Lothian and Hawthorn Pit in County Durham, two converter stations will be built to change the electricity from alternating to direct current.
Specialist boats are then used to lay the cable across the seabed and bury it throughout the route before connecting it to the grid.
Commenting during the ground breaking was Minister for Housing and MSP for East Lothian, Paul McLennan: “I’m thrilled to be here in my constituency, East Lothian, today, marking the beginning of construction on the subsea electricity superhighway.
“As a key energy hub, East Lothian is at the heart of Scotland’s renewable growth, driving economic opportunities for both the region and the country.
“The £2.5 billion joint investment from SP Energy Networks and National Grid Electricity Transmission highlights their dedication to enhancing energy security while delivering significant social, economic, and environmental benefits to local communities hosting this vital infrastructure.”
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Said Nicola Connelly, CEO of SP Energy Networks: “Electricity supports every part of our day-to-day lives and with demand set to double we now need the grid to match.
“Eastern Green Link 1 will play a transformative role in delivering the modern electricity network needed for the future. At the same time, it will deliver economic growth, jobs and a supply chain boost right across the UK but importantly also for the communities hosting this vital infrastructure.
“Together with our partners at National Grid Electricity Transmission we will support our local communities with projects that matter to them and deliver long term social value and direct benefits for years to come.”
Energy Minister Michael Shanks said: “Today’s announcement puts us one step closer in achieving our mission to make Britain a clean energy superpower and create a cheaper, more secure energy system.
“This new electric superhighway will help us on our way by transporting more renewable energy under the North Sea to power millions of homes and businesses, while supporting skilled jobs in our industrial heartlands and saving billpayers hundreds of millions of pounds
“It forms part of our once in a generation upgrade to Britain’s energy infrastructure, using some of the most advanced subsea technology in the world.”
Carl Trowell, president of Strategic Infrastructure for National Grid Electricity Transmission said: “The electricity projects we are delivering from now to 2030 and beyond, both in Scotland and the rest of the UK are monumental. They will meet future energy demand, achieve greater energy security alongside the delivery of cleaner power, and will help to contribute to lower bills for consumers.
“With a focus on economic development and community engagement, this project will demonstrate first hand the power of collaborative, large-scale infrastructure in creating lasting positive change.”
National Grid Electricity Transmission and SP Energy Networks announced in December 2023 that Prysmian had been selected to deliver nearly 400km of power cable needed for the 190km route between England and Scotland.
GE Vernova’s Grid Solutions business and METLEN Energy & Metals have been selected to supply and construct two HVDC converter stations, one at each end of the cable.
Together, SP Energy Networks and National Grid Electricity Transmission already own and operate the Western Link, the world’s highest capacity subsea cable, and one of the longest, connecting Hunterston in Scotland to Connah’s Quay in Wales.
Operational since 2017, the link supported over 450 jobs during planning and development and has transmitted over 30,000GWh of electricity during its first five years of operation – enough to power all the homes in Wales for the same period.
