No connection to device

[Michael2501]

All devices in my home haves lost connection, they are showing as being connected to the hub and the signal looks strong, however when I try to use a device such as smart tv it says there is no internet connection, I have restarted the hub and devices several times and the issue still persists 

[Calambity]

I'm having the exact same problem with my smart tv. Are your issues now resolved?

[OGM]

Same thing here with tv, following instructions as given by Sky but still nothing even though it's saying connection is 'excellent' .......