Can I upgrade my Chessington World of Adventures Annual Pass to a Merlin Annual Pass? Yes! Upgrade your Chessington Annual Pass to a Merlin Annual Pass to experience AWESOME at 32 incredible attractions! For more information, please visit here. Related articles What perks do I get with my Chessington Annual Pass/Off Peak Annual Pass? Can I upgrade my day ticket to a Merlin Annual Pass? Ride Access Pass: New for 2020 How do I purchase Merlin Annual Pass Friends and Family tickets? I used Tesco Clubcard to purchase my Merlin Annual Pass, what type of pass does this entitle me to?