She is currently paying ~£22/month for BB & telephone, it seems to be a bit variable, depending on the calls made. I haven't any more details than that. I'm not sure of the exact package but she only uses BB rarely so bandwidth is irrelevant, and fibre is certainly not needed. I assume she's on LLU, Her exchange is Gatley. She went to Talk Talk combined after being 'ambushed' by Talk Talk smoothies in the local town centre a few years ago. The last communication from Talk Talk re any 'contractual' matters is early 2010.
She wants to be able to retain her present land line number and, because of husband illness and other family illnesses she can't be without a land line at all, certainly not for more than a few hours (if any break in service is inevitable).
Clearly going back to BT for telephone may be comforting for her - no problems in the many years she was with BT before Talk Talk. Whether BT would, for her, be best for BB, or someone else like Plusnet.
Or would it be better to go LLU with, for example Plusnet?
A key question for me is what is the best, safest, and most economical way of leaving Talk Talk for such as BT or Plusnet without any significant break in telephone service, and for her to retain her present land line number?
How long would it take to re-provision BB on any new provider's line?