Re: We may never know
Had similar happen the other month at my parents' house - their line was aged and mostly knackered, Openreach wombles were clambering up the telegraph pole to fix someone else's line, broke theirs when the pole swayed a bit. To their credit, they did at least re-string a line there and then rather than wait for one of us to go through the pain of ringing TT to get Openreach back out (been there before*), and the physical connection at the house is much tidier now.
* - best one was years ago. Openreach needed to work on base of telegraph pole. Gets crew to come dig the pavement up. Digging crew cuts through cable at base of pole taking out everyone's phone and broadband. They phone Openreach who postpone job a day to change scope. Digging crew then fills the hole in (!). Openreach eventually come out - the hole is filled in, can't do anything. Have to wait several days for new digging crew to come out, dig up filled in pavement. These days it would have been no problem, just use mobile data on phones. Back then it was a complete PITA.