Well, interesting thing is I didn't call, I just reported the fault on bt.com originally. In the afternoon I reconnected the modem again and it seemed to work fine. Today after the engineer resolved a battery contact problem my attainable rates shot up a bit.
Unfortunately however, I can't get the helpdesk to reset the profile, so could be stuck at 60/20 as I believe DLM is frozen

. I had considered contacting the mods on that forum but I expect they'll come to the same conclusion as the helpdesk, in that my line is achieving slightly above the estimated speed, and so can't justify resetting the DLM profile even though my line could achieve more.
Edited by Ixel (Tue 20-Nov-12 13:43:19)