In reply to a post by eckiedoo:

The FTTC links to the PCP double back about 5 M towards the exchange (and my door!), to an underground chamber, before turning onwards and upwards to the PCP!

So the VDSL signals have to travel about 300 M, to achieve 10 M.

I used to know a chap whose back garden abutted the exchange building. Unfortunately his line went up a side street, along the High Street, back down another side street then along the access road to the exchange. Total distance was nearly 2km.

I suggested he drill a hole through the exchange wall, pop some Cat cable through then try and find a friendly engineer