M & S ran it before, basically they sell several different items for 1c only. Last time the limit was 5 items per person and they idea is that you donate a few quid to charity if you like.
Got some chocolates, mini chocolate log cakes, savings box, gents tie, pair of socks, jigsaw, journal, M & S mug. Other bits and pieces as well. Only lasted just over an hour in Blackrock - all gone by 10.30 a.m.