Yes you can, please make sure to check the terms & conditions of any promotion & follow the instructions from where you received the vouchers on how to redeem these.
All guests, including those wanting to redeem promotional vouchers, must pre-book online.
Even if your voucher says it can only be redeemed on the day at the attraction, you must still pre-book online.
For further information on how to redeem your voucher, please visit here.