The Co-op has withdrawn all batches of its own-label multi-pack crisps because the ready salted flavour contains casein which is not declared on the label.

Casein is unsafe for people with a milk allergy or milk intolerance.

The affected products are Co-op Ready Salted Crisps 6 x 25g, and Co-op Assorted Crisps 6 x 25g, all use-by dates.