Get to the train station. Normally trains take 6 hours to get to London. It's Sunday so it's going to take 7 and a half. Via Stirling and Lincoln. At least it wasn't a bus replacement.

It would have been quicker and much less stressful to have driven to the airport and flown. In fact, probably cheaper. I much prefer to use trains and a bus but it's not hard to understand why people choose not to, particularly in more rural areas.