We note that hotels and restaurants must close, except for delivery and takeaway, as well as pubs, and clubs, and shops, except supermarkets, corner stores, petrol stations, bike shops, post offices, banks, auto rentals, and others.
As part of the new restrictions, people nationwide are now no longer allowed to leave their homes unless going to the shop for necessities, to exercise once a day, for medical reasons or for key workers to travel to work.
Going out for exercise will be allowed once a day, but parks will be patrolled to make sure there is no abuse of these rules.
He said that "no Prime Minister wants to enact measures like this" as he reminded the public of the support programme to aid ailing businesses and struggling individuals.
'Hopefully lockdown doesn't send us all bat**** insane.
Another, Emily, said: 'And lockdown begins for the UK.
Jasmine Williams said on Twitter that isolation was "driving me crazy" on the second day as the three-week lockdown was announced this evening.
What are the United Kingdom lockdown rules?
His call came after the United Kingdom death toll hit 335 and British citizens travelling overseas were told to return home "while you still can".
"We will beat the coronavirus and we will beat it together". He's doing everything he can to pull this country through a healthcare crisis.
But some Britons had a more lighthearted response to the news, taking to Twitter to share memes and joke about forging "new identities" every time they visit Tesco.
Or they could seek medical help, provide care to a vulnerable person or travel to work if "absolutely necessary", he said in a televised address from within Downing Street.
You should not be meeting family members who do not live in your home.
"If you don't follow the rules the police will have the powers to enforce them, including through fines and dispersing gatherings".
And I know that as they have in the past so many times.
Mr Johnson said: "You can be in no doubt that each and every one of us is enlisted; each and every one of us is now obliged to join together to halt the spread of this disease; protect the NHS; and protect many, many thousands of lives".
"But only when this is absolutely necessary", Johnson said, "and can not be done from home".
Because the critical thing we must do is stop the disease spreading between households.
The government's Cobra emergency committee met at 5pm and signed off the extraordinary new restrictions - similar to those which have already been imposed across the rest of Europe.