https://www.reuters.com/article/us-health-coronavirus-britain-apps/uks-centralised-covid-19-app-will-offer-more-insight-says-programme-head-idUSKBN22G24U

The COVID-19 smartphone app being developed by Britain will be able to give serious insights into the virus by virtue of using centralised matching, despite its offering less privacy than rival apps, the head of the programme said.