P
We are going to make some up for forthcoming holiday in Scotland. Triple-layered masks only are acceptable up there.
Not according to this from gov.scot
"What is a face covering?
A face covering can be any covering of the mouth and nose that is made of cloth or other textiles and through which you can breathe.
Religious face coverings that cover the mouth and the nose count as face coverings for these purposes.
You may also use, if you prefer, a face visor but it must cover your nose and mouth completely.
When applying or removing the covering, it is important that you wash/sanitise your hands first and avoid touching your face.
After each use, you must wash the face covering at 60 degrees centigrade or dispose of it safely."
Their advice (re washing/sanitising hands, not touching face) is also pretty much impossible to follow unless you're in a sterile environment.