The 20Mbps, (technically ADSL2+ up to 24Mbps but they can no longer advertise such speeds), speeds are distance-related, just like the 8Mbps ones are probably much slower than 8Mbps at some properties in your village. At a distance that gives somewhere between 5 and 6Mbps the 20Mbps ceases to be much faster, and at slower speeds than that is no better at all.
It can in fact be less use, as it an be less stable. On these forums there are many that are on an "up to 20Mbps" circuit but force it down using their router to get better overall performance. This graph
will give you some idea. In the real world, as opposed to laboratory testing, that high end bit where ADSL2+ gains a bit again doesn't happen.
To get the ADSL2+ supply in your exchange requires the installation of the actual DSLAM or MSAN hardware there to replace the 8Mbps kit. AIUI, that may be happening before too long (in BT time!). LLU suppliers such as Sky and TalkTalk may or may not bother.
Your exchange will already be connected by fibre, but the capacity could be low.
It is possible for places like yours to get FTTC without ADSL2+, with the fibre being supplied from one of the larger exchanges. Openreach are doing that in quite a few areas.
My broadband basic info/help site - www.robertos.me.uk
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UnLim Fibre (FTTC). Sync ~ 59.4/14.4Mbps @ 600m. - BQM
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Edited by RobertoS (Wed 04-Dec-13 19:06:11)