People without coronavirus symptoms will be told to self-isolate for two weeks if they're "tracked" in the new tracing regime.
It came as a senior health chief revealed the government's initial attempts to track and trace people infected with Covid-19 in mid-March was abandoned due to the sheer scale of cases.
The new plan, due to take effect from June 1, will see people asked to stay indoors for 14 days if they've been identified as having been in close contact with someone who is infected.
But it's unclear if the self-isolation will be enforced, as Health Secretary Matt Hancock appealed to Britons to "do their bit" to help prevent a second peak of the virus as lockdown measures are eased.
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