Prime minister makes grim announcement during Downing Street press conference.
The new variant can spread more quickly but is not thought to be any more lethal.
Opposition MPs in Canada’s Parliament have also criticized clipped debates.
The U.K. prime minister is said to be in "extremely good spirits."
The British PM is said to be in "good spirits" in intensive care.
Johnson continued to show persistent symptoms 10 days after testing positive.
The British prime minister says he's self-isolating with mild symptoms.
Brexiteers partied in Parliament Square as the UK's 47-year membership to the EU came to an end.
Some foreign workers might not be feeling at home in Britain right now.
The Conservatives promise to pull out of the EU by Jan. 31, 2020.