In January, Transport for London applied for anti-social behaviour orders to be issued against four unnamed young men. Under the terms of the ASBO, they are prohibited from speaking to one another for ten years, carrying equipment that may be used for exploring after dark or blogging about ‘urban exploration’. Their crime: in the early hours of Easter Monday last year, as ever-tightening security encircled London ahead of the royal wedding, the group entered Russell Square tube station, and walked along the deserted train tracks and closed tunnels to the abandoned station at Aldwych.