That's how I spotted the neighbour across the road swamping our property with their wifi signal, looking on line Virgin are recommending signal boosters rather than having sagecomm look into their algorithm used to check for channel congestion, before turning mine into a modem I noticed all the VM routers would be in the exact same channel range, what every they're doing isn't working clearly.
Currently my 5Ghz range wont even connect, I've been trying all sorts, of channel and width combos, even had the devices sat on a wooden table less than 1m away from each other.
I've also noticed the virgin media sagecom router isn't going into a fully modem mode, resulting in a double NAT network, maybe once they go full FTTP we can do away with the lump of junk and hand the R3 hanging right of the fibre line, currently they still have the screw in COAX into the router/modem.
I'll keep tinkering, if I figure anything out I might open a thread to share, my back ground in ISPs, networking and Linux is a bonus that's for sure
I spotted the double NAT when troubleshooting a routing issue with a Zabbix server I'm hosting.
Update
It must be a bug, I did a factory reset on the virgin router, set it back to modem mode and its now no longer a double NAT network