Food watchdog in urgent talks over meat scandal
The Food Standards Agency will meet suppliers and retailers later to work out how to prevent contaminated food being sold in shops or used in prisons.
Recently traces of pork have been found in halal products for prisoners and horsemeat in supermarket burgers.
The FSA said firms must make sure food contained what it said on the label.
Steve Wearne, from the FSA, said it had called an urgent meeting "of a range of suppliers" on Monday where it would "stress again the responsibility of all food businesses to ensure the food that they sell contains what it says on the label".