I have a Cadbury Free Ticket voucher, do I need to pre-book? You will need to pre-book a ticket to guarantee entry, please do so here. Please bring your pre-booked ticket and your Cadbury pack voucher to gain entry at the turnstiles Related articles Do I need to book online in advance if I have a promotional voucher? I have a Sun 2 4 1 voucher, how do I pre-book? How do I redeem my Kellogg's Cereal Pack Grown Ups/Mates Go Free voucher? 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?