I think all the engineer would be is test the line from the cabinet or pole to the BT80
(small white box) before it would of reached the master socket.
And that being well they will install a new NTE5A or newer Master Socket.
If the drop wire is split, they may have to replace either the entire cable from the enclosure in the chamber to your home, or they will just install a small black tube shaped enclosure just below the gutter on your home and join a new cable down the wall, we had the second one done to us a while back.
But if its that bad and the engineer can see it, just try and bribe them with a cup of Tea and some Jammy Dodgers, they might replace the whole cable if its needed, but at the end of the day it all depends of the engineer that you get.
- Infinity 4 - 310Mbps (down), 31Mbps (up)