How do kids on school transport socially distance? Or anyone on a train when there’s no enforcement or seats blocked off so people sit anywhere?
On a nearby island, the available seats are clearly (un)marked.
And, if you do choose to disobey any of the rules, you'll explain yourself to the chap in the fur coat.
Of course, the trains are still much less used there, as the 'advice' is to not travel unless your journey is absolutely essential - the government having not 'sold' the public transport to their school friends, who want the revenue stream restarting.