Insulate Britain protesters have blocked the Port of Dover and climbed on top of fuel tankers as part of their ongoing protests over climate emissions.
More than 40 people, who have been involved in Insulate Britain's 10 days of motorway protests, have blocked the A20 at the Eastern Docks roundabout.
It comes after a judge granted an injunction banning the protesters from blocking the M25 motorway after the group caused chaos on the carriageway.
Pictures from the Port of Dover on Friday morning show activists in high-vis vests sat in the road, stopping lorries from reaching the main cross-channel ferry terminal.
One demonstrator has been pictured standing on top of a HGV, holding a sign saying 'arrested four times because I am in mourning for life on earth'.
A spokesperson for Insulate Britain said: "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."
In a video filmed at the port on Friday morning, protesters can be seen moving out of the way to allow an ambulance through their lines.
In a statement, Insulate Britain said: "We are sorry for the disruption that we are causing. It seems to be the only way to keep the issue of insulation on the agenda and to draw attention to how poorly insulated homes are causing ill health, misery and early death for many thousands of people.
"We are failing the country's cold hungry families and the elderly and placing an enormous burden on the NHS.
"Insulating our leaky homes is one of the most cost-effective ways to reduce carbon emissions and it has all these additional benefits - reducing fuel poverty, creating jobs, reducing the burden on the NHS and protecting people from overheating during future heat waves. It's a no-brainer. Boris just needs to get on with the job."
The Port of Dover is Europe's busiest ferry port, handling 17% of the UK's trade in goods.
It was used by an average of 6,200 road haulage vehicles every day last year.
The blockage comes amid disruption to supplies across the UK due to a shortage of lorry drivers.
And Insulate Britain protesters were earlier this week threatened with up to two years in prison if they continued to block the M25.
Transport Secretary Grant Shapps confirmed that National Highways had sought the legal ruling, which was granted by a judge earlier this week.
Get all the latest news sent to your inbox. Sign up for the free Mirror newsletter
Breach of the injunction can be punishable by up to two years in prison and an unlimited fine, according to the Department for Transport.
Mr Shapps previously tweeted: "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."
Insulate Britain activists also held a demonstration outside the Home Office's Westminster headquarters on Wednesday.
Police officers are at the scene in Dover attempting to divert traffic.
