Re: Business Model:
"Didn't work so well in the Worboys case, did they? So TfL getting on their high horse about standards seems rather hypocritical. Likewise those Brummie examples."
So, what are you saying? The checks don't work, so they shouldn't do them? In which case, I would ask do you lock your front door? I ask because people who lock their doors are still burgled from time to time, so surely locks don't work.
Clearly, of course you should lock your door. Door locks do stop a lot of burglaries, and I wager that checks do stop a lot of potential attacks.