The installed capacity of the UK’s offshore wind sector has risen by 79 percent in a year. In the period from July 2012 to June 2013, capacity increased from 1,858 MW to 3,321 MW, boosted by four huge wind farms becoming operational – Greater Gabbard, Gunfleet Sands III, Sheringham Shoal, and London Array (pictured), which at 630 MW is currently the biggest offshore wind farm in the world.