App users who are 'pinged' after coming into contact with someone who has tested positive are not obliged to stay at home. Only legal requirement is if Test and Trace contact you. The reminder comes amid claims that Brits are deleting the NHS app to avoid being 'pinged'. App users are entirely anonymous and the app cannot force them to self isolate or identify them if they are failing to do so. 'The app will advise a user to self-isolate if they have come into close contact with someone who has tested positive for coronavirus.
Source: Daily Mail July 07, 2021 15:08 UTC