A £2m wind turbine was knocked over by the wind after raging storms and 50mph gales made the blades on the 300ft rotary turn at twice their normal speed. 

The turbine, which was almost the height of St Paul's Cathedral, was torn apart by the raging winds and eventually collapsed to the ground in February. 

Families in the nearby village of Gilfach Goch, South Wales, said the noise sounded like 'thunder and lightning.'

An investigation, launched by manufacturer Nordex, found a power failure caused the blades to run in an 'overspeed condition' for more than four hours and rotate uncontrollably in the 50mph winds. 

Giant £2million wind turbine was knocked over by the WIND after rag...