TT of course, but maybe you don't fancy them direct.
However vivaciti, uno I think, and possibly ADSL24, offer ADSL2+ using the TT exchange equipment but their own backhaul. Partial and/or full LLU, and I think they have monthly contracts as well.
Ask them

. Or try their availability checkers.
What are your line stats though? You may not benefit from ADSL2+.
My broadband basic info/help site - www.robertos.me.uk
Domains,website and mail hosting - Tsohost.
Connection - Plusnet Extra Fibre (FTTC). Sync ~ 56.0/13.9Mbps @ 600m.
"Where talent is a dwarf, self-esteem is a giant." - Jean-Antoine Petit-Senn.
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Allergy information: This post was manufactured in an environment where nuts are present. It may include traces of understatement, litotes and humour.
Edited by RobertoS (Sat 01-Sep-12 22:54:17)