Helenlouise, I agree that with the on-set of the winter colds and coughs season, there are many,normal conditions, which have symptoms like cough, sore throat, even loss of smell.
However, schools are so scared of actually missing a real case, that they are just insisting on anyone pupil or staff, who have any of these conditions get tested.
My daughter was 99% that her cough & sore throat, was just that, but she was not permitted to return to work until she got a negative test - which she now has.
As winter progresses, this is going to happen time and time again. Every school needs to have testing facilities for their staff and pupils if they have any real hope of staying open and providing proper education.