Back when we were sewing for Scrubs Up, we were given a pattern for a 3 layer mask, and it was described as being 'NHS visitor standard'. I have checked and it still is.
It is of course, easier for NHS clinics to give you a mask they know to be of the correct standard than to check yours, but it is still a decent standard for ordinary interactions.
Ethical question - how do you feel about second chance??


