How does the ANPR camera know I have pre-booked?

When you pre-book at a ticketless ANPR car park, your booking details including your vehicle registration number, are passed to the camera system. When you arrive and leave, the cameras will recognise you as a pre-book customer. As long as you do so within your agreed booking times, the system will not charge you. If you stay longer than your booking time, you’ll need to pay for this overstay at the pay machine in the car park before you leave.