The internal wiring is just the usual domestic shoddily done extension boxes that I guess are wired into the NTE.
In my last property I just plugged my VDSL modem directly into the BT MK3 faceplate over the master socket.
Chances are the ISP will send you the hub, and a few filters and away you go. Is the setup perfect, not really, will it work - yes.
If you get the max sync speed it likely will not matter anyway.
What are your estimated speeds?