Ah yes, I forgot about them (stopped using the site after I got into a disagreement about an exchange location on their site - I told them it was elsewhere and provided pictures yet they told me there was no way BT was wrong and the location they were given, the middle of a field, was 100% correct)
Anyways, they get around it by saying there is "something" on the line and not revealing exactly what it is but 99% of the time it's ADSL.