A friend's DS was in out with his mates and fell over cutting his hand. He is 15 and had some money so thought he would get a box of plasters from the shop nearby. They refused to serve him without ID proving he was over 16. The shop assistant said it was illegal (it isn't, but if shop policy would be flagged on the till so not the assistant's fault).
Booze, fags, knifes etc no problem. But why would anyone think that plasters are a health and safety risk to kids?