The camera catches Jacinda Ardern in her pyjamas, bleary-eyed with exhaustion. It follows her wiping crumbs off the worktops, breastfeeding, trying to take a phone call while simultaneously retrieving something her curious toddler has picked up off her desk. They are scenes many frazzled, distracted working parents will recognise, except that at the time she was the prime minister of New Zealand and these home movies – shot on her husband’s phone, originally for family consumption – have since been turned into a documentary premiering in British cinemas this December.

Prime Minister, the movie, is the latest step in Ardern’s campaign for politicians to be allowed to reclaim their humanity, which broadly means the public accepting that they are grappling with the same private pressures as the rest of us (and no doubt similarly making a hash of it at times). It was the message of her recent memoir, A Different Kind of Power, and in some ways of her time in office, made only more urgent lately by the avalanche of violent threats and abuse heaped on anyone in public life – as if by getting elected they had become instantly dehumanised.

Of course, politicians are only........

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