Free fair trade chocolate with your free hot drink from Waitrose cafes.
This is for fair trade fortnight, running from 27th Feb to 12th March.
No mention of the chocs being around if you're getting a take-away coffee, but if you're in a store with a cafe, and ask for a take away, I'd say chances are good :)
If you aren't making any other purchase at all, to get your coffee free in a cafe, make a purchase of a flavoured syrup for your coffee. It counts! ( thank you to poster boyaloud for that fabulous tip!)