But the new super-sized turbines that are being counted on to make this market-transforming jump in power production aren’t ready for action yet — and time is marching on.

Two years ago, consultancy GL Garrad Hassan ran a “gap analysis” of testing facilities for the next generation of offshore turbines. Though blueprints for a pair of giant 100MW demonstration laboratories off England and Scotland and a small bolt-on site at Dong’s Gunfleet Sands wind farms were already being drawn up, the study flagged up a looming shortfall of grid-connected sites for the host of 6-8MW machines needed for the coming build-out off Britain.

Now