Kain
Devices that I had successfully working prior to the problem are still listed, but not working as far as the Tapo App is concerned. I have left a couple in situ, just in case.
Having deleted a device using Tapo and attempting to add it back does not see it being added to the list of connected devices. Similarly, trying to add a new device not previously registered behaves the same: refuses to connect the VM******-2G network.
There are no visible errors messages other than the generally helpful message that the Tapo App provides telling you what you can try. The only information really is that the device won't connect to selected network.
I'm inclined to try and get a Hub5 - the reason I haven't till now was that "if it ain't bust, don't fix it". I notice that Virgin say that Hub2 are still perfectly acceptable to carry on using, not so the Hub3. Also, I try to do my bit for the environment not upgrading at every opportunity.
Bob