Anyone who does not understand that the principal terrorist groups, with al Qa'ida in the lead, already know all they need to know about Security procedures in the UK and elsewhere doesn't begin to understand the problem of achieving good security of air transport.
As the PLO, Black September were doing in the 1970s, joined by PIRA then and later, al Qa'ida and others now have sleepers and informers where they need them. Some will be British citizens with squeaky clean records employed by BAA and other UK airports to touch up A&Cs gonads.
For balance, it should be pointed out that others will be equally squeaky-clean US Citizens employed in the same role by TSA.
Scary, isn't it?
Carry on posting, fellas, you're not going to reveal anything new.