jura2 regarding your post @ 12:59 today, I would certainly not cite Preston and Cambell as being anywhere near the centre of Labour movement thinking at the present time.
For that I believe anyone only needs to look back at the Blair premiership years to see why the broader Labour membership in the country is very firmly holding to the present policies, including that on Brexit. Those often poorly paid trade union members have paid affiliation subscriptions to the Labour party for over one hundred years.
However, following years of Tory Government throughout the 1980s-90s, a Labour government was elected in 1997, and grassroots members throughout the movement expected much to change for them. That certainly did not happen in their eyes. Instead, they had the beginnings of the Gig Economy, Zero Hours contracts, the Banking Crisis and the Iraqi War to name just a few things that in the view of the grassroots members Blair and his cohorts were responsible for.
The rank and file members in the trade union side of the Labour movement also did not see any relief whatsoever during the Blair/Brown years in the draconian anti-trade union legislation brought in by the Tories. That included the naming of all who are to be involved in any industrial action to their employers fourteen working days before any action commences. That legislation apply's even after a postal ballot of members has taken place and a majority vote for the action, and that is viewed by today's trade union membership as a total betrayal by the Blair government.
The above has ended any prospect of the broader movement ever supporting a centre-left Parliamentary Labour party for the foreseeable future. What we now have in that broader movement are People who are working parents but need the support food banks being trapped in the Gig Economy or Zero hours contracts. They often live in Privately rented accommodation with no security of tenure for them or their families.
The above persons care little about Brexit it means nothing to them, for they are more concerned with where the next full day's work is to come from, or what they may receive from the food bank that week, or how long they will be allowed to remain at their current address.
At the Labour Movement delegates Conference held last September, those attending chose to go for a General Election as first priority as that they see as the only way to bring about change to the above. I believe that even at such an election if the electorate rejected current Labour policies and the persons leading the Parliamentary party, then those policies still would not change even in defeat.
Never again will the Broader Labour movement in the country support a Blair style government, for any Labour administration will have to come to power speaking for those grassroots members, or it will not come to power at all.
That is where the Labour Party/movement are at the present time and will remain for the foreseeable future, I believe.