My boyfriend and I booked our tickets on a whim a few days ago and he did not have his passport number handy so we entered a series of zeros thinking that we could change it online later.

Silly silly us. No option to do that.

Is it worth trying to phone and change it or can we do it at the desk when I (a lowly non-EU passport holder) queue to prove who I am. (He is British.)

I know the jokes about RyanAir fees, but has anyone actually been charged for this?