Corrosive Shame

I'm pretty sure that's always been the case on Midland Mainline, a return to Nottingham (from London) is GBP 91 on the day (either at the station or on the train) or GBP 34 if you book well in advance. But what you can do is buy a single on the way out and a return on the way back, then use the return portion on the out leg next time, which is massively cheaper (since the first leg of the second ticket is off peak and the second leg is valid at peak times).

I do this way too much...