You would need to contact Openreach who own and manage the network.
I doubt they'd answer such a question. No doubt a contracter will arrive one day and just start putting up a dropwire.
"Openreach Limited is a company wholly owned by BT Group plc - yes, it DOES exist."
I assume that you are referring to the discussion on Page 1 of this thread?
You are correct that Openreach is wholly owned by BT Group PLC.
However, there is no such company as "BT Openreach", and Openreach never refer to themselves as such, (officially).