Ticket promotions that give you a free ticket with the purchase of an adult ticket are always based on the full price adult ticket. Generally these promotions are only valid with tickets purchased on the day and not tickets booked in advance or online.
Please check the promotion's terms and conditions carefully prior to your visit and ensure you bring a valid voucher on the day of your visit. Every voucher will have a website URL printed on it that will allow you to view full terms and conditions including date exclusions
Please note: The promotional voucher must present be presented on arrival to redeem the offer.