@AlrightTreacle
Aren't we aiming to be able to test 500,000 people a day in the UK by October? There was 2.75 million secondary school pupils in the UK in 2017 according to Google, guessing it's still more or less the same, so to test all of them would take up 5 and half days of our testing capacity, leaving one a half days testing capacity for everyone else. Not going to happen.
Just to clarify 500,000 TESTING CAPACITY is the target - the government has virtually never been hitting the 100,000 people tested level.
They count the test they post out as two (nose plus throat) and the figures are an enormous fudge 
We have very poor testing in the UK.
Oh, and we'll over 3m secondary pupils now I believe (hence our overcrowded schools!)