Does anyone have any Kelloggs cereals lurking at the back of the cupboard that have a voucher for adults go free at the Shrek adventure in London please? I do believe the voucher is also printed on some Cadbury chocolate so if anyone has any of those lurking (highly doubt sealed chocolate lasts long in some houses - mine included). Or if anyone can point me in the direction of any they have seen in supermarkets… I can’t seem to find any in any store thanks in advance!