Are there restrictions for using a Merlin Pass at LEGOLAND Discovery Centre Birmingham? For information regarding restrictions, please visit here. Related articles How do I pre-book a timed entry slot with my Merlin Pass? Does LEGOLAND Discovery Centre Birmingham have a car park? I’ve already used my pre-book allocation but would like to book for Summer instead, can I cancel? Can I change my visit time or date after my original visit time or date via Booking Portal? When is the quietest time to visit?