On 20 May Sir Keir Starmer asked the Prime Minister why there had been ‘no effective’ attempt to trace the contacts of those infected with Covid-19 since 12 March when tracing was abandoned. Mr Johnson replied, ‘We have growing confidence that we will have a test, track and trace operation that will be world-beating and yes, it will be in place by 1 June.’ He added that 24,000 contact tracers had already been recruited. The government does not have the luxury of testing and piloting this behind the scenes for months to come, so the system will have to evolve as it goes. On 21 May the NHS said, ‘Time is running out to finalise a “track-and-trace” strategy that would avoid a potential second surge in coronavirus cases.’