Unfortunately, there are a few of my colleagues that have not been issued a pass yet(licence/id is used to access airside).
Staff on temporary passes I can see being treated as full blown terror suspects.
But it's a start.
As for the traditional warm British welcome. I think you'll find that not all of Britain subscribes to this crap. (have a review of this thread, and you'll see for yourself) It's simply a matter of the wrong people making bad decisions, implemented by power-hungry middle people, using cheap labour, with poor procedures and no latitude for common sense.
The rest of Britain would, I have no doubt, provide you with a very warm welcome. Just don't try to smuggle in a large tin of shaving foam. We (or to be exact, they) would rather sell you 2 small tins instead.