An extract from the article What Labour's Batley and Spen Victory means for the Party's left (Tom Blackburn in the Guardian):

Those hoping that this byelection result will pour oil on troubled waters and bring an end to Labour’s factional infighting are likely to be sorely disappointed, however. On the contrary, the party’s right wing will most likely take the win in Batley and Spen as a green light to step up its factional war on the left. Sources close to Starmer have already started issuing thinly veiled threats of vengeance against Rayner, as well.

Just last week, some of Starmer’s allies were suggesting he should make do with being another Neil Kinnock; in other words, give up on any hopes he might have had of becoming prime minister and instead settle scores with the Labour left on their behalf. In particular, this means ensuring that the left is never again in a position to win the party leadership, specifically by changing the rules for future leadership elections.

There will therefore be pressure on Starmer to capitalise on the win in Batley and Spen by further marginalising the Labour left, deterring future leadership challenges from this quarter and possibly clearing the way for a shift in policy direction. Starmer won the Labour leadership promising to bring about unity and a decisive end to its years of exhausting internecine strife, precisely what party members wanted to hear. But just over a year on, it remains as divided as ever.

To this end, there is speculation that Starmer and his backers are planning to return to the old electoral college system. This would give the parliamentary Labour party – where the left accounts for only a fairly small minority – a disproportionate share of the vote, presumably making it all but impossible for the Labour left to win again. This is despite the fact that it was actually the Blairite right that successfully badgered Ed Miliband into introducing “one member, one vote” in the first place, in what transpired to be a calamitous miscalculation.

Well it doesn't look promising, does it? No accommodation or compromises, just an eye to marginalisation. Not the way to stop the infighting, but Starmer hasn't got the vision to see that.