I have a promotional voucher, how can I pre-book? Please visit https://www.thorpepark.com/tickets-passes/promotional-discounts/ for advice on how to redeem any valid promotional offer. Related articles I have a promotional offer, how do I use this online? I have a Kellogg’s snack pack voucher (e.g Fruit Winders, Rice Krispie Squares), how do I pre-book my ticket? I have a Kellogg's Cereal pack, how do I pre-book my ticket? I have a Sun 2 4 1 voucher, how do I pre-book? Is my promotional voucher valid?