Should trains have mask and non-mask carriages?

In deciding whether or not to wear a mask after 19 July, I am sure Boris Johnson is right that one must consider the feelings of others. But I notice this consideration is argued only one way: those not wearing masks are asked to consult the sensitivities of those wearing them. Should not people who insist on continuing to wear masks also be invited to reflect on whether their behaviour might upset the unmasked? After all, in a culture long committed to showing your face as a mark of trust, covering it is depressing and even intimidating for others. It makes people almost inaudible. Or perhaps the simpler answer on trains is to have mask and non-mask carriages, like the smoking and no-smoking ones of old.

In his cover piece this week, Ian Williams rightly mentions Professor Peter Nolan, the intensely pro-Xi Jinping director of the China Centre at Jesus College, Cambridge.