Wind power supplied all of Denmark's electricity needs for the first time ever on 15 September, according to preliminary figures from the country's transmission system operator Energinet.

High winds helped deliver 130% of the country's electricity requirements from midnight to midnight last Sunday, the TSO said.

The surplus power was sold abroad, with wind generating up to 60% more electricity than was needed between 2am and 3am, it added.

Energinet energy strategic advisor Carsten Vittrup said: “Just 10 years ago, winds only filled about one-fifth of our supply, so things have gone insanely strong when we have not just hours, but 24 hours where wind turbines produce more electricity than we need.”