In Costa today so obviously allowed to sit in without a mask. I stood up to go to the loo and no sooner had I taken one step I was yelled at by one of the staff (and I do mean yelled) telling me I needed to wear a mask if I was going to walk around. Now I'm no expert but I'm fairly certain air does not circulate in restricted hight zones! This makes literally no sense whatsoever. Who are making up these rules because they clearly not being made by anyone with even the slightest understanding of how particles act once they are in the air!