Thanks. I realise there's not a lot to gain from a few dB, I just get a bit annoyed when I'm possibly being limited for no specific reason (Apart from all the other obvious limitations that the line has - Plusnet's margin etc)
If anybody is interested, my stats are on mdw as 'andyf'. They are a bit patchy at times as I've been experimenting with different hosts to do the uploading.
My line length is about 500m I believe, so I think Im actually getting a pretty good connection considering that. It's a new development, and I think they put in new copper from the box when it was built three years ago.
Andy.