An NHS worker reacts at the Aintree University Hospital before the Clap for our Carers campaign in support of the NHS, as the spread of the coronavirus disease (COVID-19) continues, in Liverpool, Britain, Apr 23, 2020. (Photo: REUTERS/Phil Noble)

LONDON: Britain's COVID-19 death toll passed 20,000 on Saturday (Apr 25) in what the interior minister called "a tragic and terrible milestone" as she urged people to stay at home.