@KJ4 So I'm just going to get some of the cable and install it myself before they arrive rather than trying to pull a co-ax through a duct.
Unless you can get VM-supplied coax, then you may be inviting problems. RG6 doesn't have any meaningful specification these days other than being a catchall term for 75 ohm coax. Because of the wide range of frequencies that cable internet uses, it is far more susceptible to radio frequency noise ingress. Ordinary "RG6" coax or even "satellite grade" coax may be inadequately screened, and if that happens it will harm speeds and possibly reliability. Some is suitable, much of it is not. Any supplier claims of "VM compatible" or "suitable for cable TV" should be taken in the same way as any Boris promise.
Obviously, if you can get VM supplied cable, and you are competent to make very high quality terminations the technical concerns do not apply, but even so the VM technician who does the installation SHOULD be very suspicious when they arrive, because company policy (and the T&Cs of your contract) is not to allow customers to supply their own cable or make changes on the RF side of things, based on long experience of uncovering problems due to this. I'd suggest leaving the coax cabling to the VM technician, and either put in a conduit with easy surface access, or a pull rope for cable. The technician should fit the hub where you want and supply and run the necessary cabling (and don't let them insist they can't do that, it's their job to install where the customer requests).
In terms of the new build handbook, that's what VM demand of housebuilders. What they themselves do is rarely anything like as professional, and occasionally to the standards of DIY SOS.