NHS Test and Trace
The government has warned that only people with coronavirus symptoms should ask for a test from the health service.
"It records the minimal amount of personal data and most of the data is only recorded on the phone," says one cyber security expert.
Fresh blow to 'NHS Test and Trace' system as figures worsen again. Number of tests processed also fell by 19%.
The app is now available to download in England and Wales. But some people have had concerns.
App launched in England and Wales on Thursday, after months of delay
Experts explain why a theory doing the rounds about the number of people wrongly diagnosed with Covid-19 is simply not true.
Shadow cabinet minister Rachel Reeves says the government has "serious questions to answer" over Concentrix's involvement in the service.
NHS Test and Trace launched in May with a pledge to “help identify, contain and control coronavirus, and reduce the spread".
The NHS Test and Trace boss says current swift turnaround tests starting to hit the market are too unreliable for use within the health service.
Poll shows 74% favour publicly-run system as concerns over contractors like Serco grow.