Originally Posted by stut
Bear in mind that if you miss your Ryanair flight check-in cut-off, expect nothing. They will not check you in a second later, and will not, as a matter of course, put you on a later flight.
They will (space permitting) - but you have to pay a rebooking fee (is it £25?) plus the difference between the fare you paid and the lowest available fare on the later flight.