Minnie_the_Minx
someinenhhanding menbag and me ah bollox
Well, first thing is probably to trace along the wiring and note anywhere it looks like it could be damaged - obvious kinks in the cable, places where a staple has squished it down particularly viciously. If there's nothing obvious, it could be a problem in the socket at the far end (which sounds like it needs replacing anyway). Get your electrician mate to take a look in that and see what's going on.
Worst case scenario is that you have to run another length of telephone cable from the NTE5 to wherever you want the extension socket - that's no big deal; it's cheap enough, and not hard to do.
The cable goes outside the house from what I can remember.
Anyway, will ask him to look at it, but is it worth me buying an ADSL socket as there's no extra wiring or anything involved? Don't want to complicate things