Do I need to pre-book my visit with a Combination Annual Pass? No, you do not need to pre-book with a combination annual pass - you have unlimited entry all year long. Related articles How do I book a time slot with my Merlin Annual Pass? Why do I need to book a time slot with my combination ticket? What is included with my Combination Annual Pass? Do I need to pre-book my visit with a LEGOLAND Discovery Centre Annual Pass? When is LEGOLAND Discovery Centre Manchester open?