@sparkymarka is correct. VM's cable in off the street is a triple-shielded coax. The nearest equivalent in an aftermarket product is Webro HD100. It's actually now a better spec than the stuff VM are currently using. HD100 is all copper; the core and all the shields. The stuff VM are using now is a copper coated steel cable (CCS) with aluminium for the foil- and braid-shields.
The end plugs are the same type of fitting as satellite receiver connections. They're a screw fasten type deal. The plugs are fitted to the cable using a compression tool. These used to be expensive specialised tools, but you can now pick up the tool and 20 plugs on Ebay for under £20.
HD100 is a coax, marginally thicker at 6.7mm than good quality TV/sat coax but much stiffer because of the extra shielding. It's fine for straight runs but a PITA for routing around corners. Trying to run it tidily inside is a bit of a challenge.
@sparkymarka raises a good point:
do you really need to move the hub?
If all you need is a wired Ethernet connection in an upstairs room then it would be much simpler to run some Cat cable.
I run outdoor cat5e at 5mm diameter for certain IP CCTV work. This gives be Gigabit speeds. That's as fast as the VM hub sockets run, so you're not losing anything.
The cable I run is about the same thickness as BT's phone cable. It's much easier to route and hide.
On a little job last week I ran a line out from the customer's lounge where their hub lives, and through the same hole as the existing TV coax. There was enough space without the need for extra drilling. You wouldn't be able to do that with HD100.
The kit for terminating Cat cable is less than a £15. There are kits available on Ebay. Some even include the testers. Here's one for under a tenner: Ebay ref 272558928986.
Once you have your Ethernet cable in to the room then add a 6- or 8-way Gigabit network switch. This will give you more ports than the router alone. I have a Netgear GS208 8-port Gigabit switch sat on my desk right now. That's £17 from Amazon.
If you want some help on the cabling I can send you a length of this same Cat5e with one end ready terminated for you and a couple of plugs with the easy-fit through connections and a bunch of cable clips.