When you buy a promotional pack of Kellogg's cereal you can get a discount code for Shrek's Adventure London giving you a free adult ticket.
It may also be promoted as 2-for-1.
This is when you buy an adult or child ticket, you get an adult ticket free.
How to claim
Pre-booking is essential for Merlin Entertainment’s Attractions. Simply find the 10-digit unique code printed inside promotional cereal packs or follow the booking link on your Snack Pack and go to www.merlinfun.com to select the attraction and secure the date you want to visit.
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