‘Low-hanging fruit’: Insulate Britain’s message makes sense, say experts

While its tactics are controversial, there is widespread agreement' with the group's demands

Just after 8.15am, a few dozen people split into two groups and stepped on to the A20 just outside Dover before unfurling banners and sitting down in the road.

Traffic quickly backed up, bringing widespread disruption to the country's busiest port and an angry reaction from motorists and politicians.