I have a promotional offer, how do I use this online? Please see here for advice on how to redeem any valid promotional offer. Related articles How do I redeem my Kellogg's Cereal Pack Grown Ups/Mates Go Free voucher? Do I need to book online in advance if I have a promotional voucher? I have a Cadbury Free Ticket voucher, do I need to pre-book? Is my promotional voucher valid? I have a Kellogg’s snack pack voucher (e.g Fruit Winders, Rice Krispie Squares), how do I pre-book my ticket?