& I absolutely do agree that it's inconvenient, unpleasant & an all round pain in the arse.
I've got several very nice, otherwise, students who are constantly being written up for behaviour points because they just can't seem to remember to stop pushing the mask down to their chins.
Persistent offenders are given a day of distance learning - we have quite a few DLing students anyway, as it's an international school, so work is routinely posted online. If they can't comply, they need to not be on campus.
As a country we are doing a heck of a lot better than the U.K. in terms of deaths. A majority of the teaching staff are from the U.K., & we are horrified at how the U.K. government is expecting teachers to put themselves at risk on a daily basis - we have far safer working practices as routine.
Exams are an absolute no brainer. Running them without masks is bonkers.
If I were a parent of a child in the U.K. & objected to their being asked to wear a mask for mocks, I'd be arguing for them to complete the papers at home. Not to sit in an exam hall sans mask.
Obviously it'd be a much less effective learning experience, but at least it wouldn't endanger others.