David Cameron said Britain is a "great place to invest" as he heralded the opening of the world's largest offshore wind farm close to the coast of Essex.
Mr Cameron described London Array, in the outer Thames Estuary, as a "big win for Britain" which proves the country is capable of delivering large-scale projects.
The Prime Minister spoke at the inauguration of the fully functioning wind farm which reached full capacity earlier this year with the commissioning of its 175th and final turbine.
All of its turbines export power to the national grid and could produce enough green electricity to power nearly half a million homes a year.
More top news
A tapeworm has been found living in the brain of a British man – and is thought to have been there for four years, scientists have revealed.
The world's first folding house could be built in Cambridgeshire next year, designers say.
Granite from a quarry in Norway is being used to build sea defences in Suffolk