Chugalug2, I respect your opinion naturally, but without this next bit being taken out of context, you are looking at it through the eyes of (I would suspect) a British white male.
*Now the controversial bit* London airports (especially LHR) are frequently populated by people who do not fit this description. Before anyone screams 'racist' at me, I can assure you this couldn't be further from the truth.
Of course I am NOT generalising that every Asian/ African/ Indian etc is an extremist or a terrorist. But it only takes one who fancies a pop at an 'opportunist' target.
With the events at LHR today (and the subsequent fallout from this) and the repercussions around ALL UK airports I would suggest that the 'no-uniform' policy at UK airports is, in fact, a sensible and prudent measure.
I work at Heathrow. I will be more knowledgable on todays events by tomorrow afternoon...
CC