She needs to check which card she has as there are 3 categories of free travel:Her spouse can also travel free with her even if that person is under pension age.
The original logic of the FTP was to spread demand more evenly over the day. Commuters got to travel with less congestion, pensioners got to travel for free if they went off peak. A win-win.Previously it was valid at off peak times only, then some government changed it so that they could get more grey votes.
This means premium seats are effectively subsidised by fare payers.
They are more likely to get lost if they use itThat's very flippant you obviously don't require the service. Many older people living in rural Ireland would be lost without it.