Get a free Whopper when you trade in unwanted gifts at Leicester Square Burger this Boxing Day between 10am & 6pm.
Restrictions do apply although these haven't officially been listed by Burger King yet. Presumably the gift must be sufficient enough to actually been seen as a present, I'm sure they won't be too picky though as long as it isn't complete rubbish! Gifts that are donated are supposed to be given to charity, so it's for a good cause! Don't be too stingy with the gifts!! Guessing also one per customer.
Comment below which gifts you would/are going to exchange!