Now is the perfect time to be testing his credentials, before a leadership contest gets underway. That’s the whole point, so party members and MPs can choose who best represents them. He keeps u-turning on everything and he’s veered towards the right during this campaign quite a lot, including going back on trans rights and endorsing the home secretary’s immigration reforms. I don’t think left-wing Labour members should just roll over and take it, especially anyone from the groups he’s willing to throw under the bus to gain power.