Can you get SOTAP and VDSL (FFTC) on the same line?
My (pensioner) mother lives in a very rural area and Andrews and Arnolds is "her" ISP (which I pay for). The main issue is that a) no mobile network works indoors; and b) uptime is crap -- there were two months of 70% uptime in the last year and during both of them PSTN worked brilliantly when DSL didn't.
The main thing I'm worried about is 999 calls. She doesn't have mobile reception and PSTN is far, far more robust. She does get a lot of power cuts but that's not as common as degradation to the 10 km line from the "cabinet" by livestock or trees...
I'm sure you've considered satellite. As backup for the 999 service, maybe one of the emergency 2-way pagers carried by hikers?
As I understand it, no. Previously analogue phone service and VDSL worked perfectly fine over the copper pair, however the changeover means a SOTAP line is analogue only and no longer supports VDSL.
A SOTAP line should work through a local power cut (reminder: check ours next time), it is a "transitional product" though for longer timescales it'll have to be something else (SPOT as a satellite service springs to mind, but as a cost).
https://www.findmespot.com/en-gb