I believe I've resolved the problem, using the various ideas in a few posts above. Unplug the ethernet cable from the "smart"box (otherwise it uses that as the default connection every time it turns on). Go to Advanced Settings and reset all network connections. Then connect to the wifi guest account you've set up on your virgin router.
Should now be fine. I did a factory reset, but that didn't seem to help (beyond allowing me to connect my "smart"box via wifi, whcih it wouldn't do before).
Hope that's useful.
Just wanted to add that I am also having the same issue with the signal dropping out. I am also on Virgin Media. However, I am using the Now TV app via the PS4....
Am going to try the guest account WiFi connection as suggested by others, but wanted to give a heads up in case other app users are also having trouble 😡
internet connection keeps dropping in and out.red banner saysconnection lost and within seconds it says connection back .then have to try and get programe only for the same problem to keep happening.have tried all their fixes but still the same.been going on for thee weeks now.think i will cancel subscription unless a miracle happens in next few days.i read that disney are buying sky ,looks like they enjoy mickey mouse outfits