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 on Monday discussed the coronavirus response during calls with Scottish First Minister Nicola Sturgeon, Welsh First Minister Mark Drakeford, Northern Ireland's First Minister Arlene Foster, and Northern Ireland's Deputy First Minister Michelle O'Neill.
"During these calls, the prime minister made clear that the rising infection rates are a cause for great concern, which he is taking very seriously," a Downing Street spokesperson said.
"He reiterated his unwavering commitment to working with the devolved administrations as we continue to tackle the virus.
"They all agreed to act with a united approach, as much as possible, in the days and weeks ahead."