The meaningful vote is probably the most risky of the Lords amendments to the EU (Withdrawal) Bill - because it tees up an unpredictable vote on the final terms of Brexit, towards the end of this year, and opens up the possibility that MPs could demand that ministers change policy, in the event the terms were rejected by the House, or no deal was reached in the talks with the EU.... they could even demand (drumroll) a second referendum...
"I am incredibly sad to have had to announce my resignation as a minister in Her Majesty's government so that I can better speak up for my constituents and country over how Brexit is now being delivered", Mr Lee said on Twitter.
Members of Parliament decided by 324 votes to 298 - a majority of 26 - to reject a House of Lords amendment to the EU Withdrawal Bill.
The issue seen as most likely to provoke a rebellion was that of giving MPs a "meaningful vote" on the final Brexit deal.
His resignation didn't prompt an immediate response from the government, but at the eleventh hour, ministers evidently feared a Commons defeat. Junior Minister quit the government so he could back the veto proposal.
Labour MPs said they were confident the government would have been defeated if it had been pushed to the vote.
A Downing Street source said: "We will get a good Brexit deal that works for everybody in the UK".
Not one woman cracked Forbes’ top 100 richest athletes list
Lionel Messi and Cristiano Ronaldo both earn around the £80million per year mark, though one star does rank higher than the other. Surprisingly, the "world's highest-paid athletes 2018" compilation is an all-male affair with no women being making the list .
But the former Chancellor Kenneth Clarke has urged pro-EU rebels to hold their nerve, arguing that if they succeeded they would strengthen Mrs May's hand against the Brexit hardliners in the Cabinet. The Daily Express featured the British flag as its front page with the headline: "Ignore the will of the people at your peril".
One of the key points of difference between the Prime Minister and the rebels is a Lords amendment which states the Government must seek to negotiate a customs union with the EU.
Britain's highest-selling tabloid, The Sun, which is owned by Rupert Murdoch, addressed lawmakers directly on its front page, saying they faced a choice between "Great Britain or Great Betrayal".
The government says the changes would weaken Britain's negotiating position and is seeking to reverse them in the Commons.
In fact, her party is far from united.
Prior to the vote, Tory ministers and whips were engaged in frantic negotiations to prevent a damaging defeat over parliament's ability to block a no-deal Brexit, which came right down to the wire even as the debate carried on.