Rsuggitt,
I am a professional pilot, and operate out of one of the UK's major airports.
IF I was a terrorist, I would not even bother trying to gain access airside through the terminal's after all the boundry fences are not that hard to scale or even cut through.
Of course I could get a RPG and fire it out of a van, say a nice luton 3.5 tonne with a hole in the roof, at the end of one of the runways.
I do not have a problem with any security measures, but the security officers employed at my airport, and I am sure its not the only one, are not in any way professional, just jumped up little dictators.
Tony