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 Why do I need to book a time slot with my combination ticket? How do I redeem a 2 for 1 voucher at SEA Life Centre Manchester? What is a combination ticket? Can we bring additional free teachers/carers for SEN students as part of our school booking?