Waitrose has recalled its 500g Rhubarb Crumble due to undeclared oats (gluten) on the packaging, posing a health risk for people with oat or gluten allergies and coeliac disease. The product with use-by date August 19, 2026 should not be eaten; customers must return it to the store for a full refund. The FSA issued an allergy alert and advises checking freezers.