This issue has been solved today Eventually.
Spoke to VM support x last night who could see that there was significant issues and requested Engineer visit.
Finally got an engineer which had an insight into this issue.
The Hub4 has the gigabyte frequency / channel which is what was casuing the signal issues and degradation & rebooting etc as the fibre around our parts is quite old and not suited best for the gigabyte channle/ frquency.
He swiched back to the Hub3 Router and had ZERO issues since, I was dreading 12:30 AM rebooting .... guess what ? DIDN'T HAPPEN !, Speed is above 550 Mbps & Rock Solid...
This has worked for me .. it might be the case that everyone else having simialr issues like me might be better off woth the Hub rather then Hub4.. or It might not make any difference to others.. or even me in the long run...
Time will tell !
But for now I am a hapy bunny again 😀