It could be an EMC issue!
There have been cases in the past where an entire village has suffered regular outages of their ADSL signals thanks to local REIN sources. Power-Line-Networking/Power-Line-Technology is a known cause of interference that leaks from the mains-wiring with the very same frequencies DSL services are trying to use (same modulation techniques). I wonder how many in the village are using Sky Q with the PLT switched on (as it is by default!)? Poorly maintained electric fences can also act as spark-gap transmitters which generate large regular wide-band electromagnetic pulses which affect the 3 to 30 MHz HF band. Openreach "engineers" I have spoken to do not know the first thing about EMC, or the hoards of junk electronics that can cause it. They are not going to find a REIN issue with a casual visit to the end-user's home; and neither with Ofcom with a casual drive-through as their equipment is not sensitive enough to pick-up the interference!