Re: not round here @James 100
It's the complete absence of PCPs in my area that they cite. So there's no trunk level at which it is economical to install fibre. They'd need either to install PCPs or add fibre direct from the exchange to every individual building. The local fibre company that has jumped on that opportunity charges £20k/building for installation even after they've got sufficient interest in subsequent subscription.
Sadly the phone reception is also quite dodgy in my specific flat (though I don't think that's endemic, just bad luck on my part) so LTE-or-whatever isn't much of a fix, and the local MP has been trying to obtain funds but is a Lib Dem so I suspect BT may just be running out the clock on any effort he's creating for them. Meanwhile Boris has marked his funds for Wifi on the DLR so local government doesn't have the resources.
... and, as I said, I can therefore only imagine what service people in the countryside get, probably with just as many logistical problems but most of them so specific that there's not even an MP on their side to ignore.