Alison Millington of Business Insider UK writes the Food Hygiene Rating System (FHRS) gives establishments that serve food – from hospitals to restaurants, takeaways, hotels, and grocery shops –a rating on a scale of 0 to 5, based on factors related to hygiene, to determine which establishments are cleanest and dirtiest.

Bad scores are given for poor practices such as employees not washing their hands properly, the presence of food debris or rodent activity.

Low ratings have even been shown to affect business, with a recent survey by Checkit.com of of 1,000 people from West London finding that 61% of diners wouldn’t eat in a place with a low score.

Content marketing agency Fractl looked at the data, which is collected by the Food Standards Agency, as of May 5, 2016 to compare the average ratings in locations across the UK in order to determine which regions have the best and worst food hygiene.