An official government mobile phone app could soon track millions of people in the UK in order prevent a second wave of coronavirus infections

· The UK government is this week launching a mobile app for tracking and tracing the coronavirus.
· It will be trialled on the 141,000 people living on the Isle of Wight, an island off the south coast of England.
· Boris Johnson's government hopes to roll out the app to the rest of the UK this month.
· Scientists behind...