As a Merlin or Thorpe Annual Passholder, how do I reserve my entry ticket? As all guests must now pre-book their attendance, passholders can do this online here. Related articles How do I purchase Merlin Pass Friends and Family tickets? I have a Merlin Pass, do I need to pre-book entry? I am a THORPE PARK Annual Passholder, do I need to pre-book my entry? Do I get free parking with my Merlin Pass? Are there any dates where entry is excluded as part of my THORPE PARK Annual Pass?