One month after the transfer, Openreach ceases the PSTN line and the reaction from my new ISP was "well it's your responsibility to keep up your BT subscription" (never had BT).
Two weeks later, the PSTN line is still dark, and I'm waiting for Openreach to install a new MPF line provided by my current ISP (for an extra £10/month of course).
Apparently the reason for doing this rather than re-start the PSTN line is part of a process called "Local-loop unbundling".
The only reason I have the line is for the FTTC connection that runs over it (using Goscomb as my ISP, rather than BT) There isn't even a phone connected to it.
Same scenario and ISP here, but I switched line rental to Zen's most basic no-calls-included package at 12 UKP per month.
Still not 'cheap' but cheaper than BT Retail.
We don't even have a landline phone in the house.