Whilst on the question of landlines - ours was converted to digital a couple of years ago (as will be everyone's) - operates via broadband. Result -
during Storm Arwen we had absolutely no communications with the outside world whatsoever - no electricity, so no internet, (so no landline), phone masts down, so no mobile signals, trees down - roads blocked. You can't imagine just how annoying it was to be instructed by local radio (until batteries ran out) that information was available online ..... so much for progress.