Or try this: you need to make a business trip to Milan and back. At 5.30am, you leave your car on the premium level of the short-stay car park. You dash to the easyJet flight, which costs £22.99 one way. It arrives in Milan at 09.55, you catch the 18.10 return flight (£18.61), and get back at 19.05. Having spent more than 12 hours away, you have to pay the full-day rate of £44 for your parking space – £2.40 more than the total cost of your flights.