The implication being that they don't trust BAA to do this properly? I flew NWA via Amsterdam recently and whilst being questioned by G4S and unable to produce a ticket as I had used the code to check in online, I was NOT asked to remove my shoes. Left hand right hand let's see if we can work together and spell consistency.........
Have also seen Virgin pax at Heathrow having secondary questioning before boarding whereas BA have none and I don't believe for a minute BA have lax security....