It's the Hub 5x. I've tried so many things that I don't remember if I ever did a 60s reset with the pods disconnected so will try that again, so thanks for the recommendation.
If it's not a physical issue with the connection into the house, which it might well be since it was quite windy around here the night before it went wrong and our cables are overhead, then I'm just a little concerned the engineer visit will be the start of a merry-go-round that I've read so many complain about. I find the whole Network Access not allowed bit really weird and can't help but think it's a config issue of some sort. However the tech team on the phone said they would be able to see if anything was wrong with the config and its just a complete loss of signal.
Will keep my fingers crossed. Appreciate you getting back to me again 🙂