Britain’s May Defeated in Parliament Over Brexit Blueprint

British Prime Minister Theresa May leaves Number 10 Downing Street on December 13, 2017 in London, England. Mrs May will head to Brussels for a crucial European Council meeting this week as Brexit negotiations move onto the next phase. Jack Taylor/Getty Images

LONDON—Prime Minister Theresa May’s government was defeated on Wednesday, when lawmakers forced through changes to its Brexit blueprint that ministers said could endanger Britain’s departure from the European Union.

In a blow to May, already weakened after losing her Conservative Party’s majority in a June election, the 650-seat parliament voted 309 to 305 in favor of an amendment to hand lawmakers more say over a final exit deal with the EU.