The record-setting machine’s rotors, which reach 220 metres into the sky, sweep a circle larger than the London Eye, with a single turbine powerful enough to send electricity humming into 7,500 homes. Just to test the unit’s drivetrain at Vestas’ Aarhus factory required a new 42-metre-long rig.

The V164, originally a 7MW design, was unveiled in 2011 to great fanfare by former chief executive Ditlev Engel as an offshore turbine of “epic proportions to address energy challenges of a similar dimension”.