North Sea Link

Connecting the UK (Blyth) to Norway (Kvilldal) 

Working together with Statnett, Norway's power grid operator, we are constructing an electricity interconnector between Norway and the UK called North Sea Link (NSL). The new interconnector will link the electricity systems of the two countries via high-voltage subsea cables, running from Kvilldal in Norway to Blyth in the UK. Passing through Norwegian and British waters, NSL will be the world’s longest subsea interconnector when it goes live by the end of 2021.

With Norwegian power generation coming predominantly from hydropower plants connected to large reservoirs, it's flexible and very quick to respond to fluctuations in demand compared to other major generation technologies. However, as the water level in reservoirs is subject to weather conditions, production varies throughout seasons and years.

NSL will enable both countries to maximise the use of their zero carbon natural resources. When wind generation is high and electricity demand low in the UK, NSL will allow up to 1,400MW of power to flow from the UK, conserving water in Norway’s reservoirs. When demand is high in the UK and there is low wind generation, up to 1,400MW can flow from Norway, helping to ensure secure, affordable and sustainable electricity supplies for consumers.



North Sea Link Energy Education Centre

The North Sea Link (NSL) Energy Education Centre is a free facility, opened to further enhance pupils’ understanding of energy, sustainability and interconnectors, whilst encouraging an interest in STEM subjects and careers.

Energy explained icon interconnector

What are electricity interconnectors

Electricity interconnectors are high-voltage cables that connect the electricity systems of neighbouring countries.

North sea link cable pull


How interconnectors are helping to give us a cleaner future. Find out more information about National Grid's current and future interconnector projects.