Eco-protesters caused a lot of hot air when they stormed Didcot Power Station yesterday.

The climate change activists claimed to have cycled straight into the site through the front gate under cover of darkness to stage a sit-in.

They raced to the top of the chimney at the coal-fired Didcot A plant – which is to be closed in a few years’ time – and unfurled barely-legible banners.

Their actions prompted a full-scale security alert, with van-loads of police dispatched to the scene.

The police helicopter was also scrambled. We wonder whether the protesters, some of whom have vowed to stay up the tower for a week, stopped to think of the carbon footprint that lot caused – never mind the cost.

Ironically, the security breach came as RWE npower, the company that runs the power station, carries out work to strengthen the perimeter fence to ensure protesters are kept out after an earlier site invasion.