The UK has already confirmed plans to launch the app. It will warn users if they have recently been near someone suspected to have coronavirus.

Matt Hancock told MPs the "NHS app" will be optimised if more people sign up to it when it goes live.

Mr Hancock also told people with non-coronavirus symptoms who need medical advice that they must still contact their GP. "The NHS is there for you," he added.

It comes after reports that people have been avoiding seeking medical treatment due to the risk of being infected with Covid-19.