The NHS has written to 1.5 million people who are at the highest risk of hospitalisation by the coronavirus, urging them to stay at home for 12 weeks from Monday.
Medicines will be delivered by community pharmacists, while military personnel are helping to coordinate plans to deliver groceries with local councils and supermarkets, the government has said, as it revealed more details of its plan.
Robert Jenrick, Communities Secretary, said today: "We're asking these people as soon as they hear this news, as soon as possible, to stay at home and continue doing so for up to to 12 weeks."
It comes as Boris Johnson warned the NHS could be "overwhelmed" like the Italian health system in just a fortnight, as official guidance paved the way for British doctors to prioritise the coronavirus patients who are most likely to survive.
The UK's death toll from coronavirus rose to 281 on Sunday, as Wales declared seven more deaths, Scotland three and Northern Ireland one. Figures from England are yet to be released.
Infections jumped by almost 1,000 in a day yesterday to cross the 5,000 mark for the first time.
The PM has also asked members of the public not to visit their mothers for Mothering Sunday to slow the spread of the virus.