Some context to event: Y6 child in middle of lesson: I left my coat outside, can I go get it now? Teacher: No, you'll have to wait until home time now, as there's no adult to make sure you're safe. Y6: 5 mins later, disappears from class. Returns 10 mins later with said coat. Teacher: school policy - that's a yellow card for leaving class without permission. Phone call home: recount of events. Y6 to parent: Teacher said I could. Parent calls to complain: Y6 said he had permission.