Cancelling a booking is dependent on the type of product booked and the car park type as Non-flexible bookings cannot be cancelled at any time.
Flexible bookings can be cancelled any time after the booking is made, up to 24 hours before your booking arrival date.
There is a £10 cancellation fee, with the balance refunded. unless you took out the waiver fee when booking.
You can make the cancellation yourself by going to the help page and clicking on Cancel Booking