Under the new lockdown England’s population must stay at home except when exemptions apply, such as for work, education or exercise, while all but essential shops will close

Britain’s Prime Minister Boris Johnson has announced a new four-week coronavirus lockdown in England, which will join several European countries in imposing the measure for a second time, as Slovakia took a different tack and began testing its entire population.

Global infections are fast approaching 46 million, with close to 1.2 million deaths, and Europe is experiencing a dizzying spike in Covid-19 cases.

Under-pressure governments on the continent are scrambling to contain