Ill throw the hand-grenade in for the deluded here....
There is minimal evidence if any at all that asymptomatic carriers transmit Covid
There is minimal evidence if any at all that children, particularly the under 12s, transmit Covid
Enforced medical procedures, either by diktat or coercion (eg no test, no in-school teaching) are immoral, unethical and against the Nuremburg Code (to which the UK is a signatory)
The Government had stated that testing is not compulsory (for all the above reasons) and children will not be deprived of an in-school education if there is no consent.
Why would you want to test (unpleasantly) your children for something that, as the Government roadmap statement makes clear, is little more than a mild flu for the vast majority of people.
If we are going to plunge into the abyss lets start with TB, measles, polio, mumps, chicken pox etc and all the other more serious viruses/diseases that children may get, test for those and ban the positive ones from school.