Road-blocking protests carried out by climate campaign group Insulate Britain have cost UK taxpayers at least £4.3 million ($5.8 million) so far, an investigation has found. The information was collated by the PA news agency, which filed Freedom of Information requests to police forces who handled the protests. Insulate Britain, an offshoot of Extinction Rebellion, demands the government insulate all British homes to cut emissions. The group began a wave of protests in September and has blocked the M25 motorway, other roads in London including around Parliament, roads in Birmingham and Manchester, and around the Port of Dover in Kent. The Metropolitan Police in London said it spent £4 million ($5.4 million) dealing with the group’s protests between Sept. 13 and Nov. 20. Some 6,651 of the force’s officers and staff were involved, at a cost of £3.1 million ($4.2 million). A further £600,000 ($806,000) was spent on deploying vehicles, …