Under new rules announced by the Government on Saturday, non-essential travel, both domestic and worldwide, are banned starting Thursday November 5 until at least December 2.
"In this country, as across much of Europe, the virus is spreading even faster than the reasonable worst-case scenario of our scientific advisers".
So far, it has reported 46,555 Covid-19 deaths - defined as those dying within 28 days of a positive test.
Cabinet colleagues briefed by the PM on Saturday also told me it was deeply personally uncomfortable for a political leader who considers himself a libertarian to force England into further restrictions.
According to Finance Minister Bruno Le Maire, France's goal is to limit the economic decline to 15% during the last lockdown, roughly half the 30% decrease during the lockdown that began in March.
The British premier will set out the new measures, which include extending a financial support scheme to help businesses pay furloughed employees for an additional month to December, to parliament on Monday.
"While Christmas will be very different this year, it is my honest hope and belief that by taking tough action now, we can allow families across the country to be together", Johnson said.
Sir Iain said the Scientific Advisory Group for Emergencies (Sage) had "pressurised" the government into taking this decision, with its members "publicly lecturing" the government.
The measures will bring England into alignment with France and Germany by imposing nationwide restrictions nearly as severe as the ones that drove the global economy earlier this year into its deepest recession in generations.
"You must stay at home, you may only leave home for specific reasons, including education, work", he said.
Several European countries have instituted a second round of COVID-19 lockdowns after surges in cases, and experts say Canada may need to look at how places elsewhere in the world have handled outbreaks to avoid a similar fate.
The ramped-up response came as Britain surpassed one million cases during the pandemic, after announcing almost 22,000 new infections on Saturday, and virus hospitalisations climbed by 1,239, the highest daily tally since late April.
"It is really unthinkable now, unfortunately, that we don't count our deaths in tens of thousands from this wave", Edmunds told the BBC.
It is a giant U-turn from a prime minister that for weeks has been insisting a national lockdown would not just be unnecessary, but a "disaster" for the country, bringing with it huge misery.
"I also urge everyone to follow two key national restrictions by not mixing with other households inside our homes, and not travelling to or from any part of the country in level 3 unless it is absolutely essential".
In 10 Hospitalized Covid-19 Coronavirus Patients Were Vitamin D Deficient
That's compared to the 26 patients who did not receive the supplement, 13 of whom were admitted to the ICU and two of whom died. Vitamin D deficiency has also been linked to health concerns including heart disease, diabetes, cancer, and multiple sclerosis.