Coronavirus contact tracing explained – as NHS launches app on Isle of Wight

If the trial of the NHS track and trace app proves successful it will be rolled out later this month – and along with it, a crucial 18,000-strong team of contact tracers, still to be fully recruited.

In the meantime, one group of retired GPs has organised volunteers to run a pilot programme in Sheffield. Their aim is to show how important old fashioned shoe leather epidemiology can be.