The one message that does not seem to have got across is that they are not for anyone with any symptoms. I am utterly fed up of sending home feverish coughing children (who are not really fit for school in any circumstances) who 'passed' a lateral flow test in the car on the way to school. Most PCR results seem to be coming through in 24 hours or slightly less now, so getting a proper test is not massively disruptive.