Egg Centric
Established Member
To put it in TPE context, you can certainly do a day trip between Leeds and Manchester (as an example). The fifty miles thing might be a good starting point.
I don't agree with the suggestion at all but if we were to do it then it should be done in time not distance imo, given the variations of speeds on the network. But giving it even more thought if you were going to do this (which again I don't agree with per se; I just want low fares rather than faffing around with lots of types) is just have day tickets from everywhere to everywhere else. Let passengers decide what's a sensible day trip.