@neil-gtis No, the “phone line” doesn’t belong to BT. It belongs to Openreach, who are a separate company.
Openreach provide network connections to a lot of ISPs including Sky and BT. The telephone is merely a service that has traditionally shared that “phone line” along with the broadband.
As I said, from January, (if not already), the phone service will no longer be able share the “phone line”. It will now be part of the broadband service, whoever you get that broadband from.
That means that if you want a phone service going forward it has to be with the same provider as the broadband.
It is quite possible that your phone service has been discontinued. If that is the case, you should have been fore warned by letter and advised that you needed to change the phone service to Sky.
You really need to message BT, using the link I gave you, and ask is it a fault or has it been switched off?
The most likely scenario here isn’t that they were a BT/Sky shared metallic path customer and the BT side of the service has been cut off deliberately or has developed a fault ( as stated Sky haven’t supported this type of shared line arrangement for many years ) the OP refers to his connection as a BT line when chances are BT are not involved at all
….I suspect either Sky have moved their phone service to be delivered via the router but the OP hasn’t plugged the phone into the router , or their is a fault ( possibly dis 1leg ) affecting Sky telephone service (from the master socket ) but the broadband continues to work , probably at a reduced rate that the OP hasn’t noticed , in any circumstances it’s Sky they need to contact , it’s very unlikely BT have any relationship with the OP .
Hi there is a fault on the line in the hands of open reach could be 2 days