An image of the clock face of Big Ben was projected on 10 Downing Street, residence of British Prime Minister Boris Johnson, as Britain officially left the European Union at 11 p.m. London time.
Why it matters: "In its biggest shift since losing its global empire, [the U.K. turns] its back after 47 years on the post-World War Two project that sought to build the ruined nations of Europe into a global power," Reuters writes.
Britain's Brexit bill now only needs royal assent after lawmakers in the U.K.'s parliament ratified the legislation on Wednesday.
Why it matters: The ratification of the bill effectively ensures the U.K. will leave the European Union on Jan. 31.
The U.K.'s House of Commons voted 330-231 in favor of the European Union withdrawal agreement negotiated by Prime Minister Boris Johnson.
Why it matters: The bill must still be passed by the House of Lords, but the Commons' approval essentially ensures that Brexit will happen on Jan. 31. The passage of the bill after three years of deadlock is a result of the landslide victory Johnson's Conservative Party won in last month's snap election.
Why it matters: The vote puts the country on course for a Jan. 31 exit from the European Union. It'll also lock in a transition period through the end of 2020 — in which the U.K. will have left the EU but remain subject to many of its rules — in order for the government to flesh out new international trade deals and relationships.
Go deeper: Britain remade by Boris Johnson
Prime Minister Boris Johnson's landslide erased Britain's political map and upended its economy, The Atlantic's London-based Tom McTague writes on a stunning election with global echoes.
Why it matters: "[L]ess than four years ago, Johnson was still London’s mayor and undecided about whether to back Leave or Remain ... and Britain’s economy was among the most dynamic in Europe," McTague writes.
Millions of Britons are casting their votes today in what could be the most consequential election in living memory. One question now has less of a clear answer than ever: What will happen to Britain's terms of trade if it leaves the EU single market?
Driving the news: Polling suggests that Boris Johnson's Conservative Party will win about 43% of the votes. Under Britain's winner-takes-all voting system, that'll be enough to give him a modest overall majority in Parliament.
Senior British diplomat Alexandra Hall Hall has left the U.K. diplomatic service over Brexit, saying in a letter that she could no longer "peddle half-truths" for the leaders she does not "trust," CNN reports.
Why it matters: Her resignation comes a week before the UK general election, "at a moment of deep political sensitivity for UK Prime Minister Boris Johnson, who is seeking re-election on the promise that he can 'get Brexit done,'" per CNN. In her resignation letter, she wrote that she was unnerved to see the British civil service deliver half honest information on Brexit, and how that has undermined the credibility of British diplomats around the world.
Go deeper: Everything you need to know about Brexit
A closely watched survey of private sector activity showed the bleakest outlook for U.K. businesses since July 2016 — which was right after the country voted to leave the European Union.
Why it matters: The Brexit back-and-forth has left businesses in a tailspin amid a softening global economy.
The U.K.'s Conservative Party announced in its election manifesto published Sunday that if it wins a majority on Dec. 12, its government will seek to pass Prime Minister Boris Johnson's Brexit deal by Jan. 31 and negotiate a free trade agreement with the European Union before December 2020.
Why it matters: The manifesto rules out extending the Brexit transition period, during which the country will continue to follow EU rules as the two sides hammer out a permanent trade deal. EU politicians have expressed skepticism that a comprehensive free trade agreement could be negotiated in such a short time period, meaning that the U.K. could crash out of the bloc in 2020 without a deal.
The U.K. is now in election mode, with Parliament having been dissolved and the U.K. press running banner headlines about, um, kulaks.
The state of play: More than 60 MPs have decided not to run for re-election given the toxicity of the current political debate.