Growth continued with bigger farms and larger, more efficient turbines sitting on taller and taller masts. Scotland's sparsely populated, hilly and windy countryside became a popular area for developers and the United Kingdom's first 100 MW+ farm went operational in 2006 at Hadyard Hill in South Ayrshire. 2006 also saw the first use of the 3 MW turbine. In 2008 the largest onshore wind farm in England was completed on Scout Moor and the repowering of the Slieve Rushen Wind Farm created the largest farm in Northern Ireland. In 2009 the largest wind farm in the United Kingdom went live at Whitelee on Eaglesham Moor in Scotland. This is a 539 MW wind farm consisting of 215 turbines. Approval has been granted to build several more 100 MW+ wind farms on hills in Scotland and will feature 3.6 MW turbines.