Prawn cocktail crisps are banned at my daughters' school 'because of children with shellfish allergies'. Don't misunderstand - I am totally in favour of not endangering people's lives by exposing them to substances they are allergic to! But there are no prawns in prawn cocktail flavour crisps. There are no animal products at all - it says on the packet 'suitable for vegetarians'. It's just a name. There are no more prawns in those crisps than there are monsters in Monster Munch. Now, I did wonder if there were some brands that really do have prawn in. But no - she specifically mentioned Skips as being forbidden in her latest letter. They're vegetarian suitable too! Shouldn't a headmistress be able to read an ingredients list? I am keeping to the ban but it makes me angry to see such bad logic from a teacher.