- Video report by ITV News Science Editor Tom Clarke
A wind farm off the coast of Yorkshire, set to become the world's largest, has generated electricity for the first time.
The turbines are being constructed 75 miles out to sea and will be able to power the equivalent of a million homes once it has been fully built.
Those working on Hornsea Project One have said it "lowest cost solution" to generating clean energy.
Project worker Duncan Clark told ITV News: The scale has transformed, we're now using much bigger turbines, we're now installing much bigger wind farms, we're also doing it much further offshore."
He added: "It's probably the best and lowest cost solution that we've got available to us."
Due to the size of the turbines, one rotation can produce enough electricity to power a home for 24 hours.
Each blade is 75 metres in length and is as wide as the world's largest passenger plane.
The size of the project also means more of Britain's electricity will come from wind.