Again, the long lens probably makes the security look much worse than it is. Measured on Google Earth, the distance from where the cars are parked to the edge of the runway is about 180 metres. Even from the fence, it's about 160 metres.
Also, the fence, judged by the height of the cars, is about 10 feet tall and topped with coils of barbed wire. Where it seems to disappear, it actually just dips into a trench (maybe a canal?).
As has been pointed out, if being 500 feet or 150 metres from a plane is a huge security risk, much of west London would need to be shut down.
Last edited by Bobbsy; 13th Apr 2013 at 14:23.