As long as your booking is still in the future (minimum of 24 hours prior to arrival), you can edit your car park bookings personal and vehicle details (including registration number) on the Manage my booking page.
After entering you Booking Reference and Email address to login, you will access your full booking details. Clicking edit on Vehicle & Travel Details, you can edit your new Registration Number and then click Submit.
Changes of details can then be saved by clicking the Save button at the top of the Manage Booking page.
If arriving within 24 hours, please proceed to the Airport as normal and upon arrival at the entry barrier, please press the help button and quote your booking reference number. The friendly car park team will be able to assist.