The UK currently (2016) has the largest offshore wind farm in the world ...
The London Array
in the Thames estuary covers 100 sq km with a grid of 175 turbines. Its total output for 2015 was 2.5TWh, or enough to meet the energy needs of more than 600,000 British households, saving 1.075 million tonnes of carbon dioxide emissions.
This video was scripted, shot and edited by engineering timelines, with advice from energy engineers. The drawings are by Paul Weston, and the voiceover by Clare Sims.