Secondly how do know if your line should be clean or impacted, surely openreach should know by maps of the line?
I am currently chasing my ISP to chase Openreach to replace my underground feed which I think they accept is sub standard and not twisted pair. But what about the rest of the line can you get a pair swap if the line is within the impacted range?
www.uno.net.uk & freenetname
Asus DSL-N55U and TP-Link WD9970 on 80 Meg LLU Fibre