The law states not within 50m of a vehicle, vessel, building or structure "not under your control". Whilst you could say that standing blocking the entrance to a public monument for example while you fly close to it is arguably making it under your control, not sure that would work with an MoD establishment. There are plenty of YouTube videos showing people breaking the 150m rule with a camera-equipped uav for congested areas, too. Lots of evidence out there if they decide to stay enforcing the law that's been there for some time...
However I believe it was the nature of the area he was flying close to that dictated the official response to this one, rather than this marking a shift in attitude of the CAA.
So far...[/quot
simon you are right he his luck he just got a fine and not locked up