I have heard of a small number of cases where there are multiple FTTC cabinets with only one "original" PCP. In fact I have heard of cases where new PCPs have been installed. That has happened on one of the Bentley cabinets.
Additional delays could be down to the need to upgrade the exchange to fibre, it may or may not be fibre-fed for BTW connections; with ADSL a few hundred meg of bandwidth might well have sufficed for all the properties it served (e.g. point to point wireless).
I wonder what that big satellite dish on top of the exchange is for.