Power levels look OK. The Post RS errors on the downstream channels seem high, might be historical if the VM hub hasn't been restarted for a long time. Has it been restarted recently? If not restart it and see if the Post RS errors start growing again.
Posting the network log would also be helpful.
Disclaimer - I don't work for Virgin Media. I'm just another VM user trying to help out. My setup: V6 TV box, Vivid 200 Optical fibre with Hub 3 in modem mode connected to a Netgear R7000 router. Telewest/VM user since 2001.
The hub has been restarted several times today. I restarted it again about half an hour ago and the post RS errors are showing zero now. Perhaps the counters didn’t reset earlier?
There are some sync timing synchronisation failure, lost MDD timeout, RCS partial service, and no ranging response T3 timeout messages in the log dated earlier today, but nothing since the last reboot.