Intermittent signal

see this

______

 Have you checked first for any “known network faults in your location - Look in 2 places 
1) Try the “check service,”Area status webpage (https://www.virginmedia.com/help/service-status)

2) Then also Try the “free & automated” Service Status number - 0800 561 0061 - which usually gives the most up to date info. and tells you of more local issues and fix estimates, down to street cab/ postcode level.