How do I book Alton Towers Waterpark with my VIP Merlin Annual Pass? If you are a VIP Merlin Annual Pass holder, please complete our contact us form here. We recommend contacting us as far in advance as possible as availability for Alton Towers Waterpark is limited. Related articles Is the Alton Towers Waterpark included with my Merlin Annual Pass? How can I purchase my tickets for the Waterpark with my Merlin Annual Pass discount? Can I buy a Waterpark Annual Pass? How can I contact you? Can I renew my Waterpark Annual Pass?