a newbuild 1 year old. why not just install FTTP?
About 5 years ago I bought a flat in a development newly built by Wimpy. You can tell how much foresight went into the building from the fact that every flat has gas that is supplied through 15mm copper tube that runs up the outside of the building*. I'm surprised that's even legal.
Inside the flat there are wall sockets for phone, TV arial and satellite dish. I can only suppose these aren't actually connected to anything. The BT installer drilled through the outside wall and ran cable along the skirting board to a surface-mounted box in the good old way. Nearly every flat has a satellite dish screwed to the outside wall.
* Like the Lloyds building, only less stylish.