Ministers have ordered the creation of an NHS mobile phone app the government hopes will help end the coronavirus lockdown. The app would allow mobile phones to trace users who have come into contact with infected people, alerting them to get tested. This would make it possible to start lifting the most stringent social-distancing measures from late next month, ministers hope. The NHSX, the health service’s technology arm, has been working on the app with Google and Apple . The system will use Bluetooth to alert those who download the app if they have been in close to someone who has tested positive for Covid19.