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  • Interconnectors – Norway

  • National Grid and Statnett, the Norwegian Transmission System Operator, has signed the ownership agreement which signals the start of the construction phase for the 720 km interconnector between the UK and Norway (known as NSL). 

    NSL will connect the electricity systems of the two countries via a subsea cable, allowing the UK and Norway to trade power. The subsea cable will link to a converter station and an electricity substation in each country. 

    NSL will be the longest subsea interconnector in the world, passing through British and Norwegian waters. The interconnector will be the first electricity interconnector between the two countries and has a planned capacity of 1400 MW – enough to power nearly three quarters of a million UK homes.

    In the UK we plan to locate the converter station on a 5 hectare site just off Brock Lane in East Sleekburn, Northumberland, which forms part of the wider Blyth Estuary Renewable Energy Zone. Work has started on constructing a similar converter station and electricity substation in Kvilldal, South West Norway.

    Project partners  

    National Grid NSL Ltd is a wholly owned subsidiary of National Grid plc, a major UK company which owns and manages gas and electricity infrastructure in the UK and in the north eastern US.

    Statnett is responsible for developing and operating the Norwegian power transmission system. It owns and operates several interconnectors to other countries. 

    Statnett website

    Contact us

    If you have any questions or would like to discuss the NSL interconnector further, please contact us in one of the following ways:

    Call us on: Freephone 0800 298 0405 between 9am - 5pm, Monday to Friday

    Email us at:

    Write to us at: Freepost RSLG-YXEU-BJUC

    NSL Interconnector, PO BOX 68215

    London SW1P 9UJ