Can I purchase a Merlin Annual Pass from Shrek's Adventure? Of course! Once you have decided which pass to go for, click here to purchase your passes. You can collect your Merlin Annual Passes from the Box Office on arrival. Related articles Can I pre-book my entry with a Merlin Annual Pass? Are there restrictions for using a Standard or Premium Merlin Annual Pass at Shrek's Adventure? How can I contact you via the phone? Can we all enter the attraction at the same time through the same door? How do I purchase friends and family tickets for Shrek's Adventure! London?