Yes there is concern, as people stay at home on their days off, to avoid extra person to person contact; reducing paying passenger loads. The wind of change was already blowing this last Winter, without the Corona threat. Three major lines allegedly faced finance issues, West Somerset, Bluebell and Llangollen for varying reasons. David Shepherd said many years ago preserved lines needed to be more commercial, with nice toilets and pleasant cafes, instead of lines of rusting hulks. Don't forget as well as paying passengers and donations, many workshops like at the South Devon Railway, create valuable revenue with sub contract work; staff availability this Summer may affect this aspect..