Britain's system for tracing those with Covid-19 was under fire today as it grappled with the development of a tracking app and health workers warned the government that unless there was clarity it could suffer a second deadly wave.
Prime Minister Boris Johnson said yesterday a"world-beating" programme to test and trace those suspected of having been in contact with people who have tested positive for Covid-19 would be in place by 1 June.
Britain is currently testing the app - based on Bluetooth - on the Isle of Wight where the government says more than half the residents had downloaded it.
James Brokenshire, the junior interior minister in charge of security, said there were technical issues with the app but that traditional measures