It's action stations at the petrol stations. Right now, teams of Greenpeace volunteers are shutting Shell forecourts across London and Edinburgh. The teams are fanning out across the two cities, going station to station shutting down the pumps. In total, over 100 forecourts will be out of action, and it's all because Shell has a fleet of vessels on its way to the Arctic where they'll be drilling for oil in the next few weeks.