The world's largest offshore wind farm off the coast of Kent is to be officially opened today in a ceremony attended by energy secretary Chris Huhne.

The Thanet Offshore Wind Farm has been developed by Swedish energy giant Vattenfall and marks a major development in the renewable energy sector.

The £900 million project has 100 3MW turbines manufactured by Vestas and started generating electricity in May 2010.

When Vattenfall bought Thanet, the project already had all necessary licenses and contracts. The project was a key part of Round 2 of the UK's offshore wind programme, and it was seen as politically crucial that it was successful.

Thanet lies in sight of Kentish flats, another offshore wind farm owned by Vattenfall, and the company said that management of the two operations has been merged into one.

Including Thanet, Vattenfall said it was now producing 25% of the world's offshore wind power, a small but rapidly developing niche.

Click here or on the image below to view the BBC News report on the development, including some pretty impressive view of its size and scale.