I dismissed this as being very mild and not even worthy of thinking much about, but there are a few measures being bought in, in those places where the few cases are, it seems.
Self isolation for 21 days (!) is one I have just heard, and also it has been said that whilst it is mild, it could possibly be an issue for immune compromise people.
Adult early 30's - very difficult.
People eating and drinking on the go
To think that London, or anywhere else for that matter, does not belong to any one demographic