Re: parking officials
If there are double yellow lines there, you're running a risk; regardless of whether or not you're unloading. We all do it, but you were the unlucky one. A guy I know's Dad was unloading his car for his sons' gig in Maidstone a few weeks ago and he parked where he thought he was told he could - turned out he'd parked four feet to the right of where he was supposed to and was in the private parking space of a Solicitor's Office. £150 did the trick...
Incidentally, I know of at least one forum member who is a parking attendant.