The problem was bad on Sunday when I made the video and bad on Monday.
Engineers arrives Tuesday and the problem has gone.
He is not interested in seeing my recorded evidence and states the tests are all returning ok - until the problem returns there's not much he can do.
Welcome to our world
We have had this on and off for the last couple of years, especially after loads of rain and wind.
But >> ours <<
at the time sounded worse, you could also hear the HomeHub syncing up at 1 min into the recording.
Every time an engineer turned up (conveniently on a dry day) it was fine and no noise, but the engineer did listen to the whole recording, they then flagged it as an intermittent line termination fault that was external, that way we wasn't charged.
Over the last few months several homes on our phone pole and cabinet has had line issues and have had several engineer visits and one visit resulted in the engineer going to the cabinet where she tidied up some of the loose connections, and also did some work at the exchange, this seemed to of also solved our noise on our line.
So if or when you report it, report it as an intermittent fault, that way they know its not always there.