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None of MPs’ eight proposed Brexit options have secured clear backing in a series of votes aimed at finding a consensus over how to leave the EU.
The options included a call for a customs union with the EU and a referendum to endorse any deal.
Brexit Secretary Stephen Barclay said the results strengthened ministers’ view their deal was “the best option”.
The results capped a day of drama in which Theresa May promised to stand down as PM if her deal was passed.
The prime minister told a meeting of Tory MPs she would leave office earlier than planned if it guaranteed Parliament’s backing for her withdrawal agreement with the EU.
Her announcement prompted a number of Tory opponents of her deal to signal their backing but the Democratic Unionists suggested they would continue to oppose the agreement.
MPs hoped Wednesday’s unprecedented series of “indicative votes” would help break the parliamentary deadlock over Brexit.
The failure to identify a clear way forward led to angry exchanges in the Commons with critics of the process saying it had been “an abject failure”.