Can I use my 241/discount voucher in conjunction with a Combi Ticket? Vouchers cannot be used in-conjunction with any other offer, this is including a combination ticket. Related articles What is a Combi Ticket? Do I have to visit both attractions in one day with a Combi Ticket? Do you offer a family discount? Why do I need to book a time slot with my Combi Ticket? Can I buy tickets on the day?