Can I use my discount voucher in-conjunction with a combination ticket? Discount vouchers cannot be used in-conjunction with any other offer, this is including a combination ticket. Related articles Am I entitled to a free carer ticket? Do I have to visit both attractions in one day? Why do I need to book a time slot with my combination ticket? Can I download my photographs taken at the attraction? I have booked my tickets online, but not received an e-mail confirmation?