The Health Secretary has told Kay Burley people in England and Wales will make the country "a safer place" if they download the NHS contact tracing app on to their phones.

Matt Hancock said the app - which has been launched in England and Wales after months of delay and questions about its effectiveness - was a "helpful tool" in the fight against COVID-19.

The app uses an Apple and Google-developed system, using Bluetooth to keep an anonymous log of people a user has been close to.

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