Food Safety Report: Tesco Allerton Rd Superstore, Mather Avenue, Liverpool, UK 2 years ago • details 9 Comments Comment Suspected food poisoning. Symptoms: Vomiting, Stomach Pain, Cramps, Chills Suspected source: Their chicken sandwich Onset: 4 to 12 hours Duration: 4 to 12 hours Additional information: Severe stomach pain and vomiting, nothing else eaten today.