More than 60 food outlets in Barking and Dagenham have a Food Hygiene Rating score of two or below out of a possible five.
Fourteen per cent of the borough’s 466 food businesses currently have the low rating.
The Food Standards Agency (FSA) score means that they are classed as needing urgent improvement, major improvement or some improvement.
Research by website Checkit revealed that 61pc of customers would not eat at a resturant, takeaway, coffee shop or pub which was judged poorly.
Newham had the highest percentage of food businesses with low ratings, with 31pc receiving a score of two or below. Kensington and Chelsea and Bexley had the lowest number of poorly rated premises, both with 5pc.
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