Please don't make the expensive mistake I have. I booked my parking at Stansted at the same time as my flight. Now my flight has been moved to a day earlier. I cannot change my parking as, although booked through Ryanair, it is with a third party. I have now to wave goodbye. £69.99. So please all be careful, book directly with the parking company itself, which allows you to amend your times. Rant over!