Drive up to the barrier, which will recognise your number plate and open. The barrier will dispense an orange token, which you should take and keep hold of, then park in any space. If the barrier doesn't open, hold the QR bar code (a square with patterns in it) on your confirmation up to the scanner on the machine. Aim the red laser light at the code and you should hear a beep and be let it. If this doesn't work either, press the intercom to speak to someone at the car park. Don't press the green flashing button as this is for customers who've not booked.
Drive to the barrier, insert your token and it will lift automatically. If you've stayed longer than you booked for, you'll be prompted to make payment using the chip and pin device. If you encounter any problems, press the intercom for help.