https://www.reuters.com/article/us-health-coronavirus-britain-apps/uk-test-and-trace-system-is-on-course-for-june-1-health-minister-idUSKBN22X298

Britain's health minister said the health service's COVID-19 smartphone app was working on the Isle of Wight, where it is being trialled, and the country's test and trace operation would be ready to launch on June 1 when the lockdown is further eased.