My brother does not have internet (and refuses to have it) What happens when he loses his analogue landline?
Does he buy phone service from BT?
There are two possibilities.
1. As described above, BT could provide new equipment that connects to the phone line digitally on one side, and provides an analogue telephone socket on the other side.
2. "SOTAP for Analogue". BT install a media gateway in the exchange, and move his line across to that on the exchange side.
You don't get to choose, but if BT decide to choose to take option (2) in your exchange then there is no reason for anyone to enter the home or for any wiring changes; you brother will see no change. This service will *not* be available for new order; it's intentionally designed just to migrate phone-only services for elderly people with minimum disruption or support, and is expected to shrink over time for obvious reasons.
If BT don't install the media gateway, then they'll have to use option (1). Iif it's an elderly or vulnderable person, they'll be required to support them with the switchover. Furthermore, the device needs to be mains powered, but also needs battery backup in case of power failure. And the internal extension wiring (if any) may need adjusting.
Hence there are short-term reasons for preferring option 2, even though BT would like to stop installing equipment in exchanges, in preparation for the exchange closure programme in the 2030's.