Hi everyone, thanks for the replies earlier this week.
In follow up, I called Virgin Media Tuesday PM who went through speedtests, etc, and in the end asked me to do a 40 second reboot on the hub.
I queried a faulty hub, and replacement, but they wanted to wait....
There was no change on Tuesday, however only managed to check today due to work, and the input now is around 650Mbps with an output of 550Mbps.
Happier with the output, and now working through my wired network to upgrade to faster switches and Cat 7 cables to reduce loss.
Zak - Yes, the cable loop from and to hub worked with lights on.
Someone asked me about the version of firmware I had, maybe software; no idea why mine is different. I've not been involved in any trials or had any comms with Virgin to potentially implement an update without my knowledge?
Thanks again all. Seem to be getting there now!