[MTVN]

I can understand it as most shop staff who are serving will be behind screens and they have to converse with customers all day and that will include people who rely on lip reading. Wearing a mask for eight hours throughout which you are almost always talking is a different matter to wearing one for five minutes popping into a shop. Notice all the politicians taking their masks off the moment they have to do an interview or answer a question. I'm sure shop staff are far more vigilant about hygiene and distancing than your average customer as well as they are much more at risk.

That said I expect the majority of shop staff will voluntarily wear them