We checked in on the weekend with Ryanair, however, my wife's new passport has been delivered and we had already put in the security information. Is there anyway to change this?
Call them (the numbers listed on their website). Depending on your specific circumstances they'll probably either update your wife's information for free over the phone or they'll charge you a £15 fee to uncheck the booking and you'll be able to do it yourself. The call is cheap and the staff are friendly and professional- not what most people expect.