MUFC is easy enough to do, as you don't have to go into the stadium, and you can easily get away by walking to the other Old Trafford with a tram away. It's just trying to plan to be at Manchester when Manchester United are at home with a "low-risk" game, hope the shuttles are on and you can actually board the train.
I guess it isn't as popular as it used to be, seeing as Metrolink is cheaper & more frequent
In random news, I think I might have been on the same train as them earlier when heading to Shanklin.
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A hard line to plan I suspect would have been Nottingham - Skegness, some very limited served stations on that line, for example the train which calls at Swineshead doesn't call at Thorpe Culvert, the team will have an hour wait at Boston. Plus Ancaster/Rauceby*
(Edit that, 0709 Skegness to Nottingham calls at all stations to Grantham so I suspect that service will be used, along with the 1645 Nottingham to Skegness to get a call at Elton & Orston)