Boris Johnson will chair an emergency COBRA meeting on Tuesday ahead of a statement on the next steps in tackling the coronavirus pandemic.
It comes on a day when the prime minister will also chair cabinet – and it is expected he will announce new measures designed to curb the number of COVID-19 infections.
Ahead of this, Mr Johnson will also discuss the coronavirus response with the first ministers of Scotland, Wales and Northern Ireland later on Monday.
"One thing he will do is reiterate his commitment to working together with the devolved administrations as one United Kingdom in response to the rising infection rates that we're seeing across the UK," the PM's spokesman said.
Earlier on Monday, the government's chief scientific adviser told a Downing Street briefing that the UK could soon see 49,000 new cases every day unless action is taken to drive down the current rate of infection.
Mr Johnson has said he does not want to put the country into a second national lockdown – but it is understood that Downing Street is looking at introducing temporary nationwide restrictions to try and "short-circuit" the virus.
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