Hi Katie,
As per your suggestion, I disconnected all wifi and ethernet connections, i alos ran the Hub 3 in both router and modem modes.
I tried to change ethernet cable to my pc as well as connected a laptop to the router, all with the same result.
I have left the hub of for 5 or so minutes as well.
I have two friends, both on Virgin, within a mile of where I live not experiencing the issues at all.
Based on the above, it is safe to assume the issue is not from any of the devices in my home and is likely not area related. Could my specific installation/hub have an issue?
When this was installed, the cable was latched on to a pre-existing installation adn the technicians advised I should "let them know if there are any issues". This was just over a year ago:
Cable Install