Plans for a £20bn ($25bn) floating wind-powered North Sea 'ring main' transmission network have been unveiled by the biggest winner in Scotland’s pioneering auction to electrify offshore oil & gas production using renewables.

Cerulean Winds and development partner Frontier Power claimed their North Sea Renewables Grid (NSRG) in the Central North Sea could be one of the UK’s largest ever infrastructure projects, offering a ‘plug-in’ option for hydrocarbons.