The first stages of an English-Danish interconnector project have begun with plans to appoint a marine contractor.
The successful company will carry out surveys to pinpoint areas of environmental and archaeological interest for the 1,400MW electricity link.
It will also help identify the best route for the marine cables and suitable landing locations.
The Viking Link interconnector, which has been proposed by National Grid and Denmark’s Energinet.dk, will extend for around 650km.
It will link western coast of Denmark and the east coast of England in Lincolnshire.
The interconnector will give access to low carbon electricity, reduce energy costs for customers and increase security of energy supply, National Grid claims.
Alan Foster Director, European Business Development, National Grid said: “Connecting to Denmark will allow Great Britain to trade with the wider European, Scandinavian and Nordic electricity markets and bring additional sources of renewable energy to Britain from Denmark and its neighbouring countries.
“This in turn should have a positive impact on energy prices and increase security of energy supply for our country.”
The interconnector is expected to be operational by the end of 2022.
Plans for an offshore interconnector between Scotland, Ireland and Northern Ireland were proposed early this year.