Scotland awarded rights for a massive offshore wind development more than twice the size of the UK's current capacity, in a move that surprised the market for its scale and was welcomed by environmentalists.

The list of winning projects in the tender adds up to nearly 25 gigawatts, far bigger than the 10 gigawatts that Scottish authorities had anticipated ultimately being built. If constructed, the projects will help provide clean power for the electrification of cars, home heating and factories that will drive a doubling of electricity demand in the next three decades.

“The 25 gigawatt capacity announced this morning speaks to the ambition for the future of UK wind, but there are certainly hurdles ahead in achieving this sizable output,” said Pillsbury Energy industry partner Gavin Watson in London. “If we were able to achieve 10 gigawatts by the mid 2030s, we would be making good progress, but it remains to be seen if supply chains and other enabling factors will be up to delivering on this timescale.”