At the Waddington Air show in 2009 the was a 'UAV Pavillion' Several impressive small scale UAVs were on display. What startled me was a large display of a UAV project which would patrol the coast around Kent and Essex! Most of this area of North Kent is busy/ controlled air space.
An Assistant Chief Constable was in charge. It was due to start patrols in 2010 and be fully operational for the Olympics. Haven't seen it over here yet.....?
mmitch.