UK Prime Minister Boris Johnson has vowed to pull the country out of the European Union by Oct. 31, with or without an agreed-upon exit deal.

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But on Tuesday, Member of Parliament Phillip Lee defected to the Liberal Democrats, causing Conservative Johnson to lose his slim working majority in the House of Commons.

Lee said the U.K. government was pursuing Brexit in “damaging” and “unprincipled” ways that would put “lives and livelihoods at risk.” His decision was met with applause.

And in a letter to the newly appointed prime minister, Lee said Brexit divisions “sadly transformed this once great party into something more akin to a narrow faction in which one’s Conservatism is measured by how recklessly one wants to leave the European Union. … It has become infected by the twin diseases of English nationalism and populism.”

Film producer and “Love Actually” actor Hugh Grant shared that sentiment: “You will not destroy the freedoms my grandfather fought two world wars to defend,” he said in a tweet, calling the prime minister a “rubber bath toy.”

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