Incredibly, neither BBC or ITV Wales are reporting that no trains are running east of Reading. This has also led to some GWR cancellations for commuters within south Wales - no doubt resulting in them all trying to get on board the short Transport for Wales Trains.
I note that it is headline news in the BBC London insert into ‘Breakfast’ and BBC Bristol have also mentioned it in their insert. Presumably the Welsh based broadcasters think it is nothing to do with then as it has happened in England? (Had they bothered to inform the people of Wales, I bet a lot of them would be using their cars to get to Cardiff or wherever).