I am further south, in Kinrossshire. Last night was the most sustained extreme rainfall and thunderstorm that I can recall experiencing. I have seen impressive storms, and heavy rain, but this went on from about 10:30pm until after 7am, as good as non-stop. The lightning was almost constant. The Met office issued an Amber Warning at 22.59pm, which is very unusual.
This morning the inundation on local roads was like nothing I have ever seen before, and I was pleasantly surprised to eventually be able to get to work, but I am very surprised that a train was moving. At 8am the NE coastal area was still under the active storm.
Tonight driving home, the roads had a bit of extra gravel, but it was like nothing had ever happened.
I can’t make out from the pictures that I have seen if the railbed itself has failed. A tragic event with a lot of currently unanswered questions.