Thank you for the link, that will be my next step, I haven't had time to play around just lately, but I did order a new modem (linksys AM200) which arrived today and I now have it set up and running but I have an ethernet connection this time, have replaced the telephone extension with ethernet wire. So far so good but not going to get too hopeful unless it stays connected for the rest of today. If not then it definitely has to be on BT's end as I have now replaced EVERYTHING I possibly can. It may be my imagination but I could swear my internet seems to be faster since using this new set up.
Out of curiosity can anyone tell me why when I was connected with my old speedtouch, if I hovered my mouse on the internet icon in taskbar, it always used to say 2.2Mbps, and now with the new one it says 100.0Mpbs? Is this a good thing?