A spokesperson for KFC in the U.K. said it had launched its own investigation for this particular restaurant, which had since been re-inspected and awarded the highest rating of five out of five by the U.K.'s Environmental Health Office. The food chain added that the investigation was no longer ongoing, but said that all stores are subjected to its own unannounced independent audits.
"We take food safety and hygiene extremely seriously at KFC, and with 95 percent of our restaurants achieving a score of 4 or above, having just one of our 890 restaurants with a zero rating was completely unacceptable, which is why we worked with a specialist third party consultant to get the restaurant back to our high standards," Janet Cox, the head of health, safety and environment at KFC U.K. and Ireland, said in statement to CNBC via email.
"It was good to see from the tests that the restaurant was very clean, however we were extremely disappointed by the ice test results and immediately launched an investigation. We have also undertaken a retraining program with all team members on our standards for touch point cleaning and procedures."