Promotional vouchers can be redeemed on the day of your visit. For 2 for 1 vouchers, you will be required to purchase a full priced adult ticket to redeem the second ticket for free. Any other promotional vouchers that entitle you to a discount will be off full priced individual admission tickets on the door.
If your promotional voucher states that it can be used online, please follow the steps here. Please note: Not all promotional vouchers can be redeemed online, check the terms and conditions of your voucher to see if you can use it online.