Two wind farm projects off the coasts of north Wales and Yorkshire have received more than £460m in investment.
The Green Investment Bank is buying a 10% stake in Gwynt y Mor near Llandudno in Conwy and a 50% stake in Westermost Rough five miles offshore from Hull.
Gwynt y Mor is the largest project of its kind being built in Europe and will generate power for 400,000 homes.
Westermost Rough will use 35 turbines which are almost double the size of most currently operating in the UK.
Construction on the site has just begun, while the 160-turbine Gwynt y Mor is due to be completed later in 2014.
