I'm back! And I have broadband.
Following the advice of friends, I switched my broadband account from the Post Office, (which was dreadful) to Plusnet which, so far has been very good. The signal has been consistently strong & fast and I haven't lost it once which was a real problem with the Post Office. Plusnet customer service has been excellent, with emails at every step informing me of what's happening with my account.
A very big thumbs up from me.