And to be fair, CS have gone to considerable lengths to keep services going of late, with multiple diversions especially around Carstairs, Aberdeen works and one a year or so back around Manchester, and recently diverting into Kings Cross.
On the 73 point, if a 73 needs some help to get 8 into Inverness, you’d imagine 2 would need more than a little to get over Shap or Beattock, regardless of ETS requirements.
I think, whilst there are obviously some extreme diversions by which physically a vehicle could get from London to some point in Scotland, I’d concur with CS’ Line (obviously simplified for customer clarity purposes) that to all intents and purposes, the railway between England and Scotland was closed last night.
It does occur to me that, in another world where there was sufficient capacity, rolling stock and staff, pathing a “runs as required” service with the “spare” Pendolino or Azuma in both directions at say 0700 would be a good “one railway” approach to mopping up disruption and carry over passengers, of which from the sleeper and from LNER cancellations yesterday, I would imagine there are many this morning, and would allow them all to travel in a little more comfort. It is after all a “once in a blue moon” event.