National Highways has been granted an injunction against protesters who have been blocking sections of the M25.
The injunction will come into effect later today and means anyone breaching the order could face a prison sentence, the transport secretary has said.
In a tweet, Grant Shapps wrote: “Invading a motorway is reckless & puts lives at risk.
“I asked National Highways to seek an injunction against M25 protestors which a judge granted last night. Effective later today, activists will face contempt of court with possible imprisonment if they flout.”
The demonstrators are calling on the government to insulate all of “Britain’s 29 million leaky homes by 2030 and all social housing by 2025”.
Spokesperson Liam Norton added: “The idea that people would suddenly decide insulating our leaky homes is a bad idea as a result of our campaign is frankly laughable.
“We are simply asking the government to get on the job. The people of Britain understand that climate change is a severe threat to everything they hold dear.”