Baroness Dido Harding said there was “at no time any risk to patient data”, adding that it is kept securely “in line with data protection regulations”.
It comes as nearly 16,000 Covid-19 cases went unreported between 25 September and 2 October, reportedly due to an error with a Microsoft Excel spreadsheet.
Dido Harding is the executive chair of NHS Test and Trace and interim chair of of the newly announced Health Protection England.
Some £25 million is expected to be spent on the new app, while £10 million was spent developing the original operating model that was abandoned in June.
A recently published contract revealed McKinsey was paid £563,400 for work focused on “creating a permanent organisation” to take Test and Trace forward.
Baroness Dido Harding, who heads NHS Test and Trace, said the new institute puts the UK in the “strongest position” to stop the spread of Covid-19.
A trial for the new look NHS contact-tracing app has been launched today after NHSX abandoned its initial version in June due to technical faults.
Apple and Google’s APIs only work with a decentralised system, which leaves many iPhones incompatible with the NHS centralised contact-tracing app.
The new exposure notification settings are part of an update to the operating systems, which will enable an app to run in the background.
The app was designed to speed up the process of contact-tracing, with epidemiologists previously warning manual contact-tracing would be too slow.