Just as a summary of the steps I've currently taken with Virgin Media:
Received self install kit on 4th March as advisor stated that Virgin Media already has a socket at the property. Socket was 20+ years old and was disconnected so an engineer was booked for the 7th. (3 days without connection). Engineer came, installed the socket, ran some tests and all was well. That evening, the internet cut out twice.
The next day, I called the support line and the person on the other end stated that there was an issue in my area which would be resolved within 24 hours (turns out there was no issue in my area)
24 hours later, the issue was still persisting. I called again and was told that the issue would be fixed within 24 hours as an 'engineer is taking a look outside right now'.
24 hours later, the issue was still persisting. I called again and was told by somebody else that they are setting up an internet monitor and that the issue will be resolved in 24 hours.
24 hours later the issue was still persisting.Twitter support confirmed there's no issue in my area and asked me to set up the internet quality monitor in the post above. The result of that shows major latency spikes, coinciding with packet loss, resulting in a complete disconnection of the Hub 3.
Now on the 6th day of intermittent connection and 9th day of issues.