The Round 3 development, foreseen to be made up of between 150-450 turbines installed off the Isle of Anglesey, could power 1.5 million homes, according to the developer's calculations.

"Celtic Array has been busy completing environmental and technical surveys and assessments and have now identified the offshore project and completed an offshore Environmental Impact Assessment which identifies the likely significant effects of the proposed development," says Celtic Array, a joint venture between UK utility Centrica and Denmark's Dong Energy.

"We