The British Parliament's rejection of Corbyn's plan - widely expected - could move the Labour Party closer toward throwing its full weight behind a new public vote on Brexit.
Amid fears of further defections from within its ranks, the Labour Party announced earlier this week that it would back a second referendum. At the time, the party said that if its plans for a soft Brexit was rejected by Parliament - as it was - then it would back a second public vote.
Keir Starmer, Labour's point person on Brexit, tweeted that he was "disappointed" that Labour's Brexit plans didn't get a thumbs up, but reiterated that Labour will "put forward or support an amendment in favour of a public vote to prevent a damaging Tory Brexit."
While momentum for a second referendum has grown in recent months - and advocates swarmed Westminster today - it's not clear how many MPs actually want a do-over.
A second referendum would enrage parts of the British public, including many of the pro-Brexit demonstrators outside of Parliament, some holding aloft placards that read "leave means leave" and "Brexit means Brexit - not blackmail."
As British MPs acknowledged that they may have to ask Brussels to allow a delay, European leaders warned that an extension would not be automatic.
French President Emmanuel Macron, speaking in a joint news conference with German Chancellor Angela Merkel, said a Brexit delay would need to be "justified" by "new British choices," suggesting that May's Government would need to signal where this is all headed - versus asking for more time just because they are stuck.