Self-isolation alerts sent by the NHS Covid app fell 43% in one week, according to government figures.
A total of 395,971 alerts were sent in the week to July 28, telling people in England and Wales that they had been in close contact with someone who tested positive for the coronavirus – up from 690,129 the previous week.
Although reports have suggested that the use of the app is declining, the sharp drop in alerts has been accompanied by a similar drop in the number of cases recorded during the same period.
A total of 189,232 people have tested positive for Covid-19 in England at least once in the week leading up to July 28, down 39% from the previous week, according to the latest test and trace figures.
The number of registrations in sites using the application has also decreased. There were 2.4 million registrations in the week to July 28 in England and Wales – down 65% from the week before.
A major incentive to download it has been removed following the easing of coronavirus restrictions in England from July 19, when it ceased to be mandatory to check in at locations, which the Most people have done this by scanning a QR code with the app.