I stopped at a service station on the A14 the other week, where they sell hot food over the counter: sausage rolls and so on. In the window was this Food Hygiene Star Rating poster. Take a close look, and you’ll see they scored a two-star rating which, according to the poster, means the service station is ‘Mainly compliant with food safety legislation’.
From this I infer that it’s only occasionally so filthy in its food preparation that it actually breaks the Law.
I had a chocolate bar and some crisps.