Insulate Britain campaigners have blocked the Port of Dover as they called for a “Churchillian response” to the “urgent horror” of the climate crisis.

More than 40 people in two groups have blocked the A20 at the Eastern Docks roundabout and near the junction with Union Street for the Western Docks, Insulate Britain said on Friday morning.

This has led to vehicles attempting to cross the Channel being stuck in queues.

Insulate Britain, an offshoot of Extinction Rebellion, wants the government to insulate and retrofit homes across the UK to cut climate emissions.

Its members have caused chaos on the M25 five times in the past fortnight and were threatened with imprisonment if they returned to the motorway.

They also held a demonstration outside the Home Office’s Westminster headquarters.

Insulate Britain said on Friday: “We are blocking Dover this morning to highlight that fuel poverty is killing people in Dover and across the UK.

“We need a Churchillian response: we must tell the truth about the urgent horror of the climate emergency.

“Change at the necessary speed and scale requires economic disruption.

“We wish it wasn’t true, but it is.

“It’s why the 2000 fuel protests got a U-turn in policy and gave (Tony) Blair his biggest challenge as prime minister.”

The Port of Dover said in a statement: “Port of Dover confirms protesters are currently blocking the entrance to the port.

“Please allow extra time for your journey and check with your ferry operator for updates. The port remains open.”