Many years ago I was peripherally involved with the employment of someone like this for light aircraft duties. The BS was pretty persuasive, and he could kind of fly, but after some weeks he was asked to leave as it became obvious that he couldn’t do the job, even after a fair amount of training. Fast forward a few months and he was seen instructing BCPL students at Elstree; the CAA eventually caught up with him and it turned out he didn’t even have a PPL! I’m not sure but I think that resulted in a custodial sentence for endangerment.