Once you have collected your Merlin's Magical London Pass from Shrek's Adventure! London, you will then have 90 days to visit the other attraction/s.
Once you have made your booking, your email confirmation will include a link to pre-book the other attractions, alternatively you can visit here. You will be required to enter your Order Number and Email address used when booking to log in to the Booking Portal. You have up to 90 days from your first attraction visit date to book your visits for the remaining attractions.