This just shows up the farce that the vetting process is. The BAA pass is jsut a series of hoops to be jumped through, once you jump through them like a trained monkey, hey presto you get your pass. Exactly how deep is the background checking.
As for Airport security, another farce, as my crew and I were being screened at Stansteds VP9 recently, a staff member wearing a police or immigration pass walked right past the security screen area by just flashing his ID, NO ONE bothered to ask him to put the brief case he was carrying through the XRay or to walk through the scanner.
Terrorists are not idiots, they do not have terrorist written on their ID, they do not write down Osama Bin Laden as a previous employer.