Thank you both for your help.
I understand what's going on now. The links were also very helpful.
The video (that I'd seen earlier) was the one causing all the confusion. The installer shows him fitting a *fibre link* inside the house from a fibre wall-socket to a Boostral 720 signal converter.
{I was unaware that the old external Boostral 610 & co-ax feed through the wall was still a thing! I sincerely hope not. Poking the fibre through the wall to a fibre wall-socket helps future-proof network upgrades.}
I was concerned how long a fibre length in the house would need to be from the wall-socket to where we want the B720 & Hub to be installed. I'm hoping for internal fibre to be installed inside as opposed to co-ax so that if the m250 connection works as reliably as hoped over the holidays, we will upgrade to the full-fat fibre early in the new year.
If we can get the internal fibre done in the initial installation, then it's a simple matter to remove the old B720 & Hub co-located pair and then the 5x Hub can just be plugged straight in. It's a simple swap-out; no more hole-drilling and other disruption needed.
If the installer is not happy on the day to mess about running a fibre from a fibre wall socket to where I'd like the final Hub position to be, then I'm hopeful that I can convince the nice installer to leave a 10m length of internal patch fibre and I'll run it myself through a conduit after they're gone.
I'm actually happy to call out an engineer for the 10m fibre length to be connected in to the circuit if VM is ok with that. A £25 non-fault call-out fee is so much more civilised than the old £99 charge.
Once again I am in your debt. I am grateful to all those who haved helped.
Fingers-crossed that this all goes to plan. Susi xx
PS - All of this is moot if we get a Hub 5, as opposed to a 5x. 😁
