My experience in London is that it's easier to make out the words and thus understand a recorded announcement. Set against that, I find that hearing the same r

My experience in London is that it's easier to make out the words and thus understand a recorded announcement. Set against that, I find that hearing the same recorded announcement several times in quick succession (e.g. generic "look out for terrorists" announcements) grates, when it would not if it was being read live every time.