UK energy regulator Ofgem has given the go-ahead to the £1.1bn Aquind interconnector project between the UK and France.
The electricity cable will run undersea and underground from Lovedean, near Portsmouth to the area north of Rouen in Normandy.
The project, which will be developed by Aquind, is expected to provide up to 2GW of additional capacity to the UK power grid.
The Aquind interconnector is also projected to reduce UK’s energy prices and the nation’s per capita carbon footprint.
Aquind non-executive director Lord Callanan said: "The UK needs affordable, reliable new capacity. Interconnectors offer just that and we are looking forward to progressing to the next phase of development.
"Furthermore, our interconnector will be online quickly — in five to six years — while the alternatives being discussed, such as new nuclear generation, can take more than ten years.”
UK minister of state for energy Baroness Neville-Rolfe said: “Interconnectors can help to keep bills down and guarantee our energy security. We look forward to Aquind, and other new projects, coming forward and demonstrating how they can benefit consumers."
The project is expected to create up to 500 jobs during construction. Work on the project is expected to be complete in 2021.