Rany sky up, went through the check list - wires, bt box, test socket, etc, got passed to the CST (2nd Line), but after 45minute wait I gave up. I've got a reference number to use when I next want to ring up though.
Whilst on the phone though, I did a check of my noise margin - and it was up to 8db for most of it. I've not turned my router off since and it worked fine all last night.