You will have 90 days from the day you collected your combination ticket to visit the other London Merlin Entertainments attractions. When collecting your tickets from The London Dungeon, our admissions team will be happy to advise of the remaining availability at our other London attractions and book you in, subject to availability. Alternatively, simply take your tickets to the relevant attraction to redeem for entry. Shrek's Adventure! London and SEA LIFE London Aquarium will confirm their availability upon arrival and book you into the next available time slot. Please note, there is no option to pre-book your tickets in advance online or over the phone.