There will be no meaningful vote in parliament as party lines will be followed by almost everybody. It will be no more meaningful than the vote to hold a referendum or the vote to invoke Article 50, in both of which hundreds of MPs voted contrary to what they knew to be in the country's best interests for fear of turning their own parties and own careers into toast. This country desperately needs an anti-brexit opposition, and that can happen effectively only when Labour decides to fight for what a majority of its supporters in the electorate and almost its members voted for, which was to stay in the EU. Labour will not win the next election in any case, so that's one less reason for them to hold back. If Labour decide to follow that path in the interests of this country they will be the leading voice in a de facto progressive alliance which will not be far short of the Tory/DUP numbers. And I wouldn't mind betting that a few Tories would "defect." That would be interesting. There's an argument to be made. When I meet other Labour supporters, that's what I'm saying to 'em. And I'm not proposing a democratic sellout here either. Democracy has been sidelined in this country ever since the referendum was first called. I haven't read in any manifesto for democracy that states that the people shall be given a vote after being comprehensively lied to by both sides of the argument for six months.