Canadian police have say they have recovered 20 bodies from the Quebec train disaster, Reuters reports.
The number of people dead, or missing now stands at 50, a lower total than earlier estimates.
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From June 8, contact tracing will be supported by an online system that gives people the option of providing details of close contacts elect
The London demonstration comes after tens of thousands of people joined nightly protests across the US.
Rules will be different in Wales, Scotland and Northern Ireland.