You've all stated the obvious which I already knew but no where states the new train times. Therefore anyone travelling today won't know the exact departure times. It would have been good of them to produce an amended timetable
That's because you asked why the trains were at different times and said that there was no mention of a timetable change. We pointed out that there was a reason, and that it had been advertised. We've actually answered your initial questions. If you were looking to see the exact departure times, you could have asked us for it.
There's no specific timetable as far as I can see either, but that's probably because most people nowadays use online searches to find their trains rather than downloading or even finding a hard copy of a timetable. VT in particular have a large number of people who will be traveling on either advance tickets or with reservations. People traveling can use realtimetrains, or the Virgin Trains journey planner, or any other journey planner to find out train times. As most people would do anyway. There's also the VT pocket timetable generator. I agree that the apparent lack of a physical timetable on the VT website is not ideal, but given the nature of VTs services, I expect that most people wouldn't be adversely affected.