More than 50 protesters from the eco-activist group Insulate Britain (IB) blocked the M25 motorway at the exit leading to the Heathrow Airport on Monday morning. It’s the group’s sixth roadblock in two weeks. The group, an offshoot of Extinction Rebellion (XR), is calling on the government to insulate homes across the UK to help cut carbon emissions. The Metropolitan Police said just after 11 a.m. that officers had cleared the road and that 53 individuals were arrested and taken into custody. The Met said some of the protesters used super glue to frustrate the police response. The protest came after two injunctions were granted against the group’s controversial tactics. After IB activists ran in front of moving cars and lorries on the same motorway on Sept. 21, the government secured a high court injunction (pdf) that threatens imprisonment, fines, or asset seizure for activities such as blocking the M25 or affixing oneself to …