Theresa May's Brexit plan just received one of the biggest defeats in British history

As expected, United Kingdom Prime Minister Theresa May's Brexit plan was soundly defeated Tuesday. What wasn't expected was the incredible 230-vote margin that took it down.

Parliament voted Tuesday, 432-202, to reject May's much-decried plan to exit the European Union. It's the biggest defeat the British government has suffered in nearly a century, and leaves Brexit and May's leadership in peril, The Wall Street Journal reports.

The opposition Labour Party rejected May's proposed Brexit path, and members of May's own Conservative Party publicly joined them. Many Brexit supporters said May's deal would have given too much control to the EU to avoid a hard border between Northern Ireland, part of the U.K., and Ireland, an EU member.

This newest defeat means "all Brexit options are on the table," including a departure from the EU without any form of deal, and a second referendum to overturn Brexit altogether, per the Journal. Britain is scheduled to leave the EU on March 29, so there's not much time to find a new solution.

May had her concession speech ready before the vote, and welcomed a vote of confidence in her leadership, per The New York Times. Lawmakers narrowly preserved May's leadership in a confidence vote last month, but opposition leader Jeremy Corbyn has still called another vote for Wednesday, per The Guardian.