The NSN link, which would run 700km beneath the North Sea boosted by two converter stations, would be the longest marine interconnectorin the world.

If an investment green-light is given to the €1.5bn-2bn project next year, power could be flowing throughthe line as early as 2019.

"This is another important stage in the development. The joining of the energy systems of both countries brings much wider benefits – deliveringsecure and affordable power to consumers as Europe moves towards integrating its renewable energy,” says National Grid chief executive Steve Holliday.

Statnett also has a 50/50 tie-up with TSO TenneT and investment bank KfW to build the so-called NordLink interconnector project linking Norway andGermany.

"These