The TT website is a bit confusing, but there appear to be only three broadband products now. ADSLx at £6.50 (after the introductory free period), FTTC 38Mbps at £10, (or is that £6.50 + £10?), and similarly FTTC 76Mbps at £15 (+£6.50?).
Sky seems to have ADSLx at £7.50 and FTTC at £20. The last I heard that is 38Mbps though you can get 76Mbps by ringing up. I don't know its price.
Both of them do force you to take LLU phone as well. PlusNet just charges you for broadband setup if you don't take their (non-LLU) phone.
BT itself also requires you to take their non-LLU phone, with ADSLx at £16, 38Mbps FTTC at £23 and 76Mbps FTTC at £26.
I'm puzzled as to where you got your facts

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Edit - typo.
My broadband basic info/help site - www.robertos.me.uk |
Domains,website and mail hosting - Tsohost.
Connection - Plusnet UnLim Fibre (FTTC). Sync ~ 51.8/16.8Mbps @ 600m. -
BQM
"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 20-Jul-13 23:59:14)