I would hope that a quiet word from some bloke from the council would restore momentary common sense to the vendor
surely not! Far beyond their authority and you would have codprawn back on here ranting about the trading standards stazi again! As always the easiest way is keep you head down, fill portable tanks without making it obvious and perhaps pay at t'pump
I'm sure the poor s*d at the desk doesn't really want to get involved if it can be helped-but then again their job is on the line if they buck company policy so don't give 'em a hard time eh.