I believe underneath, technically Infinity is the same as Fibre Enhanced - they're both available on FTTC.
The only difference is BT will not show Infinity as available, or let anyone order it if their ESTIMATED speed on FTTC is below 15 megabits per second (Mbps - hope I got the capitilisation right - I'm sure to be corrected if not

).
It's product segregation. Keeps the average speeds high on Infinity, and I'm not sure on this bit but I also think there is some kind of minimum speed expectation with Infinity as well.
I had an estimate of 14.2Mbps and whilst its only been a week or so since install I am getting a consistent 35Mbps.
Fibre Broadband is available from a variety of ISPs - not just BT.
Edited by deleted (Wed 14-Sep-11 12:12:11)