The operator of one of Europe’s largest onshore wind developments said it was “surprised” by a Norwegian Supreme Court ruling that two of its sub-projects breach the rights of indigenous reindeer herders, amid claims that more than 500MW of turbines should be halted after the decision.

The court found that the Storheia and Roan developments – both of which are already operating as part of the 1GW Fosen Vind – violate the cultural heritage rights of Sami herders under UN conventions and declared their development permits invalid.