It would help if we still knew the ISP, as they can differ even on an engineer install.
In all cases work will be done at the PCP (phone cabinet) to connect your line from the exchange to the FTTC cabinet, and a return connection from that carrying both phone and VDSL2 traffic to the line from the PCP to you.
On an engineer install with Plusnet the engineer will fit a VDSL2 filter plate to your master socket and supply a VDSL2 modem to be sited close to that. They should also test the line works with test equipment and that the modem obtains sync with the FTTC cabinet.
It is up to you to have a (cable type) router and to connect the WAN port on that to the LAN1 port of the modem, using Ethernet cable. The distance between them can be up to 100 metres.
If you don't want such an arrangement, tell us why and what you would prefer. Several of us should be able to advise on your best course of action.
The indispensable man or woman passes from the scene, and what happens next is more or less the same thing as was happening before.
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