As its commissioning phase draws to a close, the UK's fourth offshore wind farm is gearing up to begin commercial operation this month. Installation of all 30 Vestas turbines at Barrow Offshore Wind (BOW) was completed in early May. The £100 million project covers ten square kilometres off Cumbria in the east Irish Sea and is a joint venture between Danish Oil and Natural Gas and British power major Centrica. Output will supply customers of Centrica's energy retail subsidiary, British Gas. At 90 MW, Barrow is one of Britain's largest offshore projects and is equal in size to Elsam's Kentish Flats wind farm, completed off the south-east coast of England in 2004. It is Centrica's first offshore venture, but will be the company's only project to be built using an engineer, procure and construct contract. For its Lynn and Inner Dowsing wind farms on the east coast of England, the group is adopting a multi-contracting approach.