Starmer will really put MPs in a dilemma if his response is word salad but along the lines I've suggested. It's the Biden Gambit: block anyone else being able to turn it around. It's infuriating, as I think Starmer would come across as a tiny bit more human (only a tiny bit) if he ditched the stupid red lines (even more stupid given how the world has shifted since he needlessly imposed them), replacing them with flexibility and pragmatism, and with it the anti-immigration rhetoric, which impresses no-one but the imaginary 'hero voters'.
I thought that with McSweeney going, Starmer wouldn't be a hostage of Blue Labour, but if he comes out saying "More of the same, but harder" this morning, we'll know that he's still a hostage, and apparently a willing one. If i were an MP in the larger, lefter bloc, I'd be plotting, but without an obvious figurhead, that's a tricky plot to plot.
As a side note, if Burnham let his ego get the better of him and resigned the Manchester mayoralty to try to become a Labour MP en route to trying to oust Starmer, it's obvious that that would go to Reform, based on the local election results.