alan_m wrote:

There seems to be a lot of people who have medical reasons for not
wearing a mask!

I've not seen many people wearing nothing at all; I regard the 'welding
visors' as a waste of time, and have noticed a few people (kids mainly)
sheepishly pulling a sweatshirt up over their chin as they scurry round
the aisles. Worst I remember was a trio of young mums with pushchairs
and not a mask between them.