Offshore wind turbine maker Siemens Gamesa has secured an extension of the original contract term for servicing the 714 MW East Anglia ONE wind farm in the UK. Siemens Gamesa said the contract, among the biggest in Siemens Gamesa’s Service business unit’s history, had been extended from five to 15 years with customers ScottishPower Renewables and Bilbao Offshore Holdings Limited.