A block of butter sold at Tesco has been recalled after it was found to contain "high levels of E. coli bacteria.
The supermarket chain revealed that a certain batch of Trewithen Dairy Unsalted Butter which is sold in a block may be contaminated.
While most types of E. coli are harmless, and normally live in the intestines of healthy people, certain strains can cause severe stomach cramps, bloody diarrhoea, and vomiting.
