If they're anything like BT's full fibre product (nothing to suggest other companies do it differently); they will pull a new fibre into your home (ideally near the existing entry point) and will install a new fibre "modem" and Broadband router (my BT 900Mbps connection is a two-box solution).
They will also install a new/extra wall-box inside or outside your home.
I expect it will be your responsibility to get a CAT5e (preferably CAT6) cable from the location of the fibre modem, to where you want the router (if it's not in the same location).
I have CAT5e in my home (I've bought a reel of CAT6; but haven't yet got round to installing it); it copes quite happily with the 900Mbps full fibre connection.
One of my business partners has Gigaclear in his village. They installed the connection into his garage, rather than into the home (where his BT phone line is located) so I imagine there's a certain amount of flexibility with some of the providers; but I doubt they'd be wanting to install fibre to the other end of your home
Ade
FTTP Halo 3 with BT
DL 900Mbps
UL 110Mbps
Edited by adebov (Sat 12-Nov-22 18:58:00)