Ryanair checkin - ID to be renewed during trip
We're off to Spain with Ryanair next month. Mrs 25F, who is herself Spanish, travels on a Spanish national ID card. This is due to expire while we are there. Of itself, no problem, she pops in to the nearest Policia Nacional and gets issued a new one.
Obviously we can't check in for the return flight until we have the new ID card. But is there likely to be any problem checking in for the outbound flight with an ID card that expires before the return?