Greenpeace campaigners attempt to shut down every Shell petrol station in London just as the oil company is about to drill in the Arctic for the very first time.The environmental group, who recently launched a star-studded campaign to save the Arctic, intend to close over 100 stations in London, and over a dozen in Edinburgh, by using the emergency shut-off switch, which stops petrol going to the pumps, and removing the fuse so it can’t immediately be turned back on again.