anotheradam
There is at least one country ( not the UK) where the screeners are screened at the start of their shift and then not checked again, no matter how often they transit from land-side to air-side. I've seen them go through archway detectors, set of the alarm and continue unchallenged. I've "discussed" the logic of this with their supervisors, filed MORs about it when I've got back to the UK. Apparently these people are sworn and badged employees and therefore can be trusted not to bring anything illegal into the Restricted Area........
Lunatics/Asylum..etc