Traditional allies such as Diane Abbott and John McDonnell are split over Friday’s vote as politicians grapple with the issue

During a Labour away day ahead of the last election, the party’s candidates were put through their paces as parliamentary debaters. The topic chosen, assisted dying, was a deliberately intractable issue designed to test their analytical skills. Yet just months later, scores of new MPs find themselves having to make a very real decision over changing the law.

“I’m genuinely the most back and forth on this that I’ve been on anything,” said one new MP who has found themselves on either side of the debate over recent months. Like so many, with the issues so finely balanced in their mind, a single conversation can sway their thinking.