Tougher lockdown measures have been introduced in parts of northern England after a rise in the rate of novel coronavirus transmission, raising concerns over a second wave.
Britain reported its highest number of new COVID-19 infections in more than a month on Thursday, as ministers warned more quarantine restrictions were possible.
Around 4 million people were ordered not to mix with other households in Greater Manchester, the biggest city in northern England, parts of West Yorkshire and East Lancashire, though they can still go to work.
Those breaking the rules will face a fine of 100 pounds.
"The problem with this virus is that it thrives on the social contact which makes life worth living," Health Secretary Matt Hancock told Sky. "I totally understand the human impact of this but unfortunately that is how the virus passes on."
Asked by the BBC if the UK was now entering a second wave, Hancock said: "It is not yet and we are absolutely determined to take the action that is needed."
The measures were introduced hastily at the start of Eid al-Adha.
North Korean leader Kim Jong Un told Russia's top diplomat his country was ready to "unconditionally support" Moscow's every effort to resolve the conflict in Ukraine, state media reported on Sunday, as the two countries held high-level strategic talks.
A preliminary report depicted confusion in the cockpit shortly before an Air India jetliner crashed, killing 260 people last month, after the plane's engine fuel cutoff switches almost simultaneously flipped, starving the engines of fuel.
US President Donald Trump defended the state and federal response to deadly flash flooding in Texas on Friday as he visited the stricken Hill Country region, where at least 120 people, including dozens of children, perished a week ago.
Russia pounded Ukraine with hundreds of drones and dozens of missiles on Saturday, in the fourth major attack this month, targeting western cities and killing at least two people in Chernivtsi on the border with Romania.