The old consumer cable RUNS INSIDE the building (now disconnected) completely hidden from view. Meaning it could be re-instated, made live again, to help find where the wire goes. At the moment no one knows where it runs, under floorboards? inside cavities? Is anyones guess. I understand there is electrical equipment electricians use that can track the course of a live cable, assuming it is Live. However this will STILL require gaining access to other flats to track where the old consumer cable goes. Leading back to the same old problem, no one has right of access.I mean you can test the other end of the cable to see which flat it is in. I am sure the Landlord of the other flats would co-operate in such a case as would the tenants if they understood what is at stake. It is confusing as you show the route of the tap cable in red and say it was on the outside wall. If it then goes into the building of your household how could someone next door gain access to the floorboards in the next house? I am afraid the vid does not explain this to me.
I think 2 flats (may) allow me in to check (28 & 28 A), however the 3rd flat 28 B (prime suspect) will NOT let me near the place. Suggesting to me that flat C is the culprit.