So it’s my impression that (and my knowledge might be out of date here) but almost anywhere that BT is then there should be at least 1 other company that operates on their lines (or rather Openreaches line, after they were split out of BT for competition purposes) so you should be able to get someone else with luck.
Try using Sam knows website and they tell lots about your line and what you can get.
Deep in the Serengeti, we find the lonesome JavaScript. With its tendrils deep in the ground, it begins consuming thousands of tiny life forms known as “node modules” to fuel its desires.