That’s it. After years and years, it’s finally officially done. Phase I of the London Array, the world’s biggest offshore wind farm with its 175 Siemens 3.6MW turbines rated at a combined capacity of 630MW, enough to power half a million UK homes, is officially open. Even british prime minister David Cameron was at the ceremony. Since construction began in 2009, a lot of teamwork was involved: Over 75 organisations have helped to build London Array with over 6,700 individuals involved.