We have recently got the virgin media wifi, but for some reason it keeps randomly cutting out, The wifi broadcast its self is up but the connection provides no wifi, I have tried factory resetting superhub 3.0 but nothing changes, I do believe this may be a problem with the area as it used to happen on the old wifi also, any suggestions would be a help, thanks.
I would also look at the placement of your SH3. Wireless interference can be caused devices TVs, baby monitors, Microwaves, Fairy lights, PIR sensors. So ensure the SH3 is not placed directly next to one. Also if the device is covered (e.g. on a bookshelf) this can impact wifi.
Is it all devices or just the one? If only the one it could be down to the device - e.g. driver update required.