Are there restrictions for using a Merlin Pass at The London Dungeon? For information regarding restrictions, please visit https://www.merlinannualpass.co.uk/ Related articles How can I purchase Merlin Pass Friends & Family Tickets for The London Dungeon? I am a Merlin Pass holder, how do I pre-book entry? Is the attraction suitable for children? Do I need to pre-book entry with my Merlin Pass? What documentation do I need to provide to receive a free carer ticket?