Well, I'm back online.
I was reconnected yesterday afternoon. Turned out the router had packed up. It took the engineer 20 minutes to trace the fault to the router. After the engineer left I then had the challenge of reconnecting my laptop, mobile, tablet, kindle, and TV box to the router. Still need to reconnect the printer to the WiFi but as I usually used that plugged into the laptop when I do occasionally print I've not worried about that as yet. Thankfully the TV box found the connection automatically.
Apologies for any pocket duties I've missed.