Firstly, I *don't* think electoral politics is the be all and end all of left interventions, it most certainly isn't. Which is why as I've said I spend far more time on non-electoral political work than canavassing on the fucking #labourdoorstep
But equally electoral interventions are significant - it's significant when good left MPs are elected (a rare occurrence) and it's significant when the extra-Labour left performs credibly. What is not significant is where new formations present themselves as offering some credible challenge, but in reality only confirm their own spectacular irrelevance.
It's a bit early to say whether that will be true of LU - although being an electoral party that abstains from electoral interventions seems odd - but, being charitable, perhaps they are taking their time to think through a decent targeting strategy. THe best thing they could do would be to concentrate on targetting a small number of symbolic targets - like Ed Balls, Rachel Reeves and Tristram Hunt.
I have every respect for groups like the independent campaign running a grassroots community candidate in a neighbouring ward to me - all the best of luck to them. I will work with them to shift the position of the local Labour party irrespective of whether they choose to join the party or continue to act outside of it.