It's chocolatey and creamy and, Holy Cow, Cadbury's Dairy Milk is made from... milk. Just in case you didn't guess from the name, the firm is printing a warning on packs that screams in capitals: "CONTAINS: MILK". The bestseller - whose TV ads boast of "a glass and a half of milk in every bar" - already has milk at the top of its list of ingredients. But now wrappers rolling off the production line at its Bournville factory will also feature the separate warning. It's just in case people who are allergic still don't know. Bars of Dairy Milk...