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We have it here too, to be worn in any circumstances where you can't reasonably leave 2m between you and someone else. Companies get 5 per person, homes get 5 per person. In practice I only need to wear it in the shops. The rule is a covering that covers up your nose and mouth so a scarf or buff is acceptable too.
The official line is that it reduces the nasty stuff you're putting out, not that it prevents you from getting it from other people and that you owe it to people around you to avoid infecting them. Sure it's a bit annoying but I have a buff I throw in my pocket if I go for a ride in case I need to stop and a couple of masks in the car for when I go to the shops. Wearing it isn't fun but I'm not wearing it for long.
Germany has just decided to introduce compulsory mask-wearing. I hope that won't be done here.