Solicitor General Robert Buckland intervened four times during a speech by the former Attorney General Dominic Grieve, whose amendment would effectively give MPs a veto on the government's negotiating agenda if a deal isn't done by the end of November.
"A meaningful vote is not the ability to reverse the decision of the referendum".
In the months that followed, May struggled to assert her authority over her party and government, with a string of ministers resigning from the Cabinet and disunity over Brexit among those who remained around her top table.
Asked what would happen if MPs rejected the deal, he said there would be no time to restart negotiations, with the United Kingdom leaving the European Union in March 2019.
"That term, Mr Speaker, is actually specifically defined in the Belfast Agreement and I've no doubt that government ministers will have read the Belfast Agreement in its entirety", she said. The Lords amendment was defeated in the Commons Tuesday by 324 votes to 298.
Dr Lee said his main objection to Government policy was over the "wish to limit Parliament's role in contributing to the final outcome" and signalled he would rebel on the issue in the Commons later.
The rebels also appeared reassured that the government would address their outstanding concerns in talks over coming days, although No 10 sources sounded a note of caution.
They did so by offering a concession to Tory backbenchers.
"I think that's where a lot of the parliamentary party are". Mr Grieve's proposal will now be added to the legislation.
Five Labour MPs - Ronnie Campbell, Frank Field, Kate Hoey, John Mann and Graham Stringer - voted with the government. "It's miserable", one complained on the way out of the chamber.
MPs were told that one parliamentarian had to be accompanied to a public meeting by a six armed police officers because of threats over their stance on Brexit.
Theresa May last night brokered a fragile unity among MPs, pressing the case that Brussels will be watching and urging them not to undermine negotiations.
Downing Street had begun the day by insisting it would not accept an 11th-hour amendment offered by Grieve on Monday night meant to soften the Lords changes and offer the government a compromise.
The United Kingdom is now part of the European Union single market but if London leaves it after Brexit, Britain will have to negotiate new trade deals with its partners, including the United States.
The opposition leader said: "We can not settle for this".