London, March 13 -- British Prime Minister Theresa May has suffered yet another crushing Parliament defeat over Brexit when MPs overwhelmingly rejected her plan to quit the EU, plunging the UK into a further period of political uncertainty just 17 days before its divorce from the bloc.

May's pleas in the House of Commons for lawmakers to support her draft exit deal on Tuesday, or run the risk of a chaotic exit from the European Union (EU) or no Brexit at all, were rejected by 391 votes to 242.

May was hopeful that last-minute concessions from the EU would swing the vote in her favour, but many lawmakers dismissed those changes as ineffectual or cosmetic.

While this marked a smaller defeat than the 230-vote margin with which they reject...