Climate campaign group Insulate Britain escalated their protest action on Friday by blocking the Port of Dover, the busiest ferry port in Europe, despite the government’s warning that they face possible imprisonment if such disruptive protests continue. More than 40 people blocked the A20 in Kent, which provides access to the Port of Dover. Their action led to vehicles attempting to cross the English Channel being stuck in queues on the A40 road. Earlier this month, Insulate Britain, which is demanding government action to insulate homes to cut emissions, shut down parts of the UK’s busiest motorway M25 five times in just over a week. Transport Secretary Grant Shapps said on Wednesday that National Highways had been granted an injunction against the protests, and activists would face possible imprisonment if they make further such attempts. But the group was not deterred and swung back into action just two days later. …