How badly affected were services during this time? I know there was a wartime timetable in effect but were services affected further during the pandemic?
That's a very interesting question. I've no idea but I know the Flu DID have a bigger impact than is perhaps thought today as of course overshadowed by war time events.
I certainly recall my grandfather (who fought in WW1) and my grandmother talking about it in a way that made it clear it had a big impact on them. I can't recall if they knew people who died of it but I suspect that at least indirectly they did.
But I wonder if then even despite the war, railways had higher levels of staffing in general, and less strict restrictions on length of hours worked etc so easier to 'keep things rolling' from those who were not struck down with it?