For anyone currently looking at trains, the National Rail database currently has a problem, so it makes out there aren't any trains back to London. I've spoken to a human at NEAA, who's confirmed trains are running, although there is an
amended timetable due to them having to juggle trains around.
For some services, a change will have to be made at Ipswich. However, the 13.38 service which I and a few others have already bought tickets for, is still running through to London.
Weather-wise, it could be wet, although we might be lucky, as Friday during the day currently looks like it'll be dry with rain moving slowly from the west.