We have a friend in a fairly isolated Welsh village who appears to have been miss sold fibre by BT. I haven’t been to look, but from what she says BT replaced there original box the phone and internet were plugged in and now if there is a power cut, where they are not uncommon, they have no phone. There is no mobile reception in most of the village, I do know that is the case! Both of them are in there 80’s and have health problems. I thought the BT fibre boxes had battery’s to provide power but they say there is no sign of any with the box installed. It doesn’t sound to promising for how fibre is going if BT are miss selling like this.