Mock parking tickets and the campaign against urban 4×4s

The campaign is known for its "theatrical demonstrations" and mock parking tickets, credited to Berry (although now adapted by numerous local groups), some 150,000 of which have been placed on 4×4 vehicles by campaigners. The group was successful in getting the Mayor of London Ken Livingstone to adopt one of its founding principles when he introduced a higher congestion charge for vehicles with high emissions.