It's difficult to know where to start with some of the idiocy that seems to be on display here. XC have 1 train a day (looks like 1M00 from Edinburgh is the only one in the current TT) that maintains knowledge of the southern half of the Old Road (good) but didn't think that there might be an unplanned scenario where knowledge of the northern part would be necessary? Presumably this means they're snookered if there's a points failure at Nunnery Main Line, Holmes or Meadowhall junctions as well? It's not like they're retaining the whole of the S&C or Cumbrian Coast - it's a short freight route which only needs 1 train at an odd time of the day to avoid Sheffield to retain.
As for the bus thing, if that's true then it's absolutely ridiculous - for the number of passengers likely to be directly impacted, surely it's well within the regulations (and probably cheaper) to offer an accessible taxi to their destination, even if that happens to be Penzance.