Not really relevant, but worth noting.
I have Hyperoptic, which is fantastic. This is fibre to the building. They bring a (BT) fibre link into the basement of a building, where there is a cabinet with router equipment.
Cat 5 cabling is then run to each apartment. The wireless router I have has Cat 5 ports for the provider (wallbox) side and for any local devices I might have.
Hyperoptic works a treat.
I am in the Rotherhithe area in London which had notoriously awful ADSL. Int he summer you woudl have droputs when the temperature went up.
The ADSL problems are a consequence of the massive expansion in housing in the area, plus I am told that the existing phoen lines wer eused as alarm lines by the dock warehouses, so go straight back to the exchange which is some distance away in Bermondsey. Also there were two routes for the lines, and I was near the furthest point on both routes.
All solved by Hyperoptic - so we can stream 4K movies no problem!