God knows what happened to those trying to get the 2248!
Had it not been for them asking me what to do ("blag your way onto any train going west as soon as possible, don't take no for an answer, not that you'll have any trouble as the gatelines will be open and 99% of GWR guards are decent and helpful") rather than relying on any published info, I have some colleagues who could now tell you...
The 23:32 to Bristol ran, and indeed arrived just 10L. Taxis from there? Ubers will probably drive into a red warning for enough money.
That the 23:32 Bristol ran all the way while the 22:49 Swansea never left Paddington let alone went part way is decidedly "interesting" in itself.
Amber warning in Bristol started at 01:00. Red at 03:00. In Newport, Cardiff, Bridgend it was... 01:00 and 03:00. 2332 to Bristol arrived at 01:23. 2249 to Swansea should have arrived at Bridgend at 01:18. "Please Explain" as they say.
Looks very much like the railway cancelling last trains for operational convenience on a face value logical comparison.
Ultimately, cancelling services in these circumstances is something reasonable people can accept, even if there seem to be logical inconsistencies. The woefully short notice aggravated by a comms void however - unacceptable.
Meanwhile, as it happens I ended up rescuing someone else by car who'd been stranded, from Bristol to the coastal Vale of Glamorgan. Down there at 3am, it was what we would once have called "really windy". What it wasn't was the apocalypse, or not yet anyway.