We are told this end that the lateral flow kits (aka fast test kits) are for asymptomatic use only. So you'd use one before visiting elderly or vulnerable people or going to an event. They are freely available from pharmacies (and from a pop-up caravan in Holsworthy yesterday!) and you don't have to sign for them or anything. That makes the reporting of your results entirely optional! Should I ever test positive I'd make my own isolation arrangements, thank you very much.