Cadbury said the famous Cadbury Dairy Milk chocolate bar -- which lists milk first on the ingredients list and explains that the bars contain "the equivalent of three quarters of a pint of fresh liquid milk in every half pound of milk chocolate" -- will soon bear an additional message reading "CONTAINS: MILK," Sky News reported Monday.

A spokesman for Cadbury said the warning is aimed at complying with laws that govern the presence of allergens in food.

However, Moira Austin, helpline manager for the Anaphylaxis Campaign food allergy support group, said Cadbury is merely "stating the blindingly obvious."

"The law requires manufacturers to list allergens if they are an ingredient. It does not require these additional warnings," she said.