Environmental activists target M25 for fourth time in a week

Grant Shapps calls for swifter police action after Insulate Britain blocks London orbital motorway again

Twenty-nine environmental protesters have been arrested for stopping traffic on London's M25 motorway for a fourth time, as Grant Shapps, the transport secretary, called on police to move more quickly to clear blockades.

Shortly after 8am, activists from the Insulate Britain group blocked the M25 and slip roads leading to the orbital motorway in several locations. They are calling for the government to insulate all homes in the country by 2030, starting with social housing.