A further 54 people who tested positive for coronavirus have died in the UK, bringing the total number of confirmed deaths in the country to 335.
NHS England said 46 more people have died after testing positive for the illness, meaning the death toll in England now stands at 303.
Four more people were confirmed to have died as of Monday after testing positive for Covid-19 in Scotland, Nicola Sturgeon has said, taking the death toll to 14.
A further four patients in Wales who tested positive for coronavirus were also confirmed to have died on Monday, bringing the country’s total to 16.
There have been two coronavirus-related deaths in Northern Ireland.
Underlining the rapid spread of the disease, the UK’s coronavirus death toll went beyond 200 only on Saturday.
NHS England said in a statement: “A further 46 people who tested positive for the coronavirus (Covid-19) have died, bringing the total number of confirmed reported deaths in England to 303.
“Patients were aged between 47 and 105 years old and all had underlying health conditions. Their families have been informed.”
Meanwhile, the health secretary has said people who are ignoring social distancing advice to stay two metres apart are “very selfish”.
In a sign that the UK could be moving towards a stricter lockdown, Matt Hancock said the government was willing to take “more action” if needed to stop coronavirus from spreading.
It comes as the usual Downing Street press conference on coronavirus is not expected to take place on Monday afternoon but Boris Johnson will still address the nation in some format.
Shops except for pharmacies and food retailers could be ordered to shut under measures being considered by all UK leaders.
Over the weekend, photos emerged showing crowds of people visiting open spaces across many parts of the UK.
The Government has said it is safe to exercise as long as people keep at least two metres away from other people.
But Labour urged ministers to act now by moving to “enforced social distancing”.
Downing Street said ministers will be looking at data on how much social interaction is still taking place and “if that information shows they haven’t stopped then we will need to take further measures”.
Downing Street also said the prime minister is “actively considering further steps” to help self-employed workers through the crisis.
It comes as Wendy Jacobs, a 59-year-old head teacher at Roose Primary School in Barrow-in-Furness, Cumbria, died after testing positive for coronavirus.
In Walsall, a 36-year-old nurse and mother-of-three is on a ventilator in intensive care after contracting coronavirus.
Areema Nasreen is in a critical condition at Walsall Manor Hospital in the West Midlands where she works.
There are growing fears that Britain is on a similar trajectory to Italy – scene of the world’s worst outbreak – where the death toll passed 5,000 over the weekend.
The Italian government was one of a number of European countries to announce new or extended restrictions – with Germany banning public gatherings of more than two people not from the same household.