Some of the products, external being recalled, or removed from sale, because they may contain peanuts include Dominos dips, SPAR sandwich fillers and salads, and Harvester BBQ sauce.

The Food Standards Agency has traced the contaminated mustard ingredients to a producer in India called GT Agro Industries. One company, called FGS Ingredients, has been identified as supplying their mustard ingredients for use in UK food.

Because of how serious allergic reactions to peanuts can be, the FSA says it is taking a precautionary approach, so that people with allergies can keep themselves safe.

Rebecca Sudworth, director of food policy at the FSA, said: “Those with a peanut allergy should avoid consuming products containing mustard as an ingredient until we identify the individual products affected.

“As soon as we have more information, we will update consumers,” she added.

According to the agency, if mustard is present in a food, it should be labelled in bold on the packet because it is an allergen itself.

If there is a risk that mustard could be unintentionally present in food, there will be a “may contain” label for mustard.