Thank you very much for that @OwainDIYer. That was very helpful.You don't need to go full fibre to have your voice 'line' switched to Digital Voice (Voice over IP).
If you change supplier, or possibly even a new fixed term contract with existing supplier, this can trigger a migration to Digital Voice over VDSL (fibre to the cabinet).
BT are wanting everyone off analogue telephony as soon as possible.
