I've shopped in four different supermarkets yesterday and today. Yesterday in Morrisons, about a quarter of shoppers were not wearing masks (unlike me...). Today in Truro Tesco, at least a third of shoppers were unmasked (I was one of them). in Sainsburys it was about one in four. In M&S, the same. I haven't worn a mask today. There has been no issue in any shop, and the signs at the entrances make it clear that it's now a personal choice. I have a new mask in my pocket and will always respect direct and polite requests to don it, but, by a couple of weeks' time, I'm hoping to ditch it and to never see a bloody mask ever again.