AAISP will probably take it on, but in rural locations you have a better chance if you can get together with others in the locality who may be having the same problems. If BT are not able to fix your friend's fault by transferring them to another pair maybe suggests that other pairs may be affected.
I had a similar situation about 4 months ago when my slow (but stable) business line suddenly became even slower and unstable. When the problem started, I wasn't with AAISP, and in the space of about 5 weeks I had no less than about 15 visits involving over 20 Openreach engineers. Eventually, it transpired that a neighbour about 400 metres away had a problem with their broadband about 2 years before, and it was put down to a cable fault which BTO at the time refused to fix. Since they were making no progress with the fault on my line, I emailed Ian Livingston, CEO of BT to complain. To my surprise he replied, and he delegated my problem to a Senior Complaints manager at Openreach. I also switched my ISP from Zen to AAISP.
To cut a very long story short, AAISP worked closely with me and BTO to resolve the problem, which involved the replacment of over 400 metres of old cables, and he digging of a 180 metre duct to lay part of the cabling in. Not only has the internet connection for the whole road become a lot more stable, most of us have seen big improvements in our line speeds. I'm not sure exactly how much was down to AAISP and how much was due to people in the road keeping the pressure on, but it certainly made things a lot easier to deal with an ISP that kept us all in the loop.
Edited by deleted (Thu 29-Oct-09 08:16:25)