Planet Pizza in Croft Street was given the score after assessment on March 28, the Food Standards Agency's website shows.
The scheme gives businesses a rating from 5 to 0 which is displayed at their premises and online so people can make more informed choices about where to buy and eat food. The rating shows how well the business is doing overall, based on standards found at the time of inspection.
In the case of Planet Pizza, inspectors said that “major improvement was necessary” in the management of food safety.
Improvement was deemed necessary in hygienic food handling, as well as the cleanliness and the condition of the facilities and the building.