Ok, thanks Togo... that seems to make a lot of sense, while still being reassuring.
I haven't watched all the questions, although the first one mentioned Care homes. I have spoken to the manager of the one I worked at, and they are arranging for a staff living area in the home. So that, if it ends up being quarantined, staff can live in and stay there, to reduce the risk of lots of different people going in and out. They haven't yet been given any official or specific advice (as we haven't either). But it seems to be just being careful and aware, so far.