Fibre 40/10 Mbs---Two years use.
No problems so far,fingers crossed!
TT Business is an LLU provider, with a UK based Tech Support. However one soon discovers that when problems occur,the tech staff have very little education wrt DSL technology and faults can take many weeks to resolve.
Top of the range fibre optic broadband is no faster than asdl
There is forever difficulty getting help when problems occur!