"I will remain in this position by 2027," the Prime Minister declared, joking that if our discussion went well, he might welcome the interviewer into Downing Street for a follow-up conversation in 2026.
There is never any break for those in the top job. In the hour before the interview began, the PM had been in calls with Ukraine's Volodymyr Zelensky and attempting to decipher precisely had happened in Venezuela, where his big friend, US President Donald Trump, had recently attacked and captured its leader, Nicolás Maduro.
Once our lengthy talk, which was far more extended than typical, had concluded, Maduro had been formally accused in New York.
As the year commences, the Prime Minister seems to have had a kind of a reboot. Perhaps even just a bit of a rest with the family at Chequers, the prime minister's official country residence.
This appeared to have left him in a more positive mood than at the difficult end of 2025, a awful annus horribilis for him.
Yet, are he and his colleagues deluding themselves if they think his standing are set to turn around?
The grisly truth for the PM is that numerous of his party members think he's underperforming at his job. Several of them would rather take a risk and oust him in 2026.
However Starmer was having none of it during our conversation on Saturday morning.
On several occasions he insisted he'd be "assessed at the poll", maintaining no one would remove his five-year mandate from him – despite the fact that the most effective strategy of halting Nigel Farage and Reform UK getting to No 10 may be for Labour to switch leader.
"This is the fight of our times and I aim to guide the party," he affirmed.
The issue for the prime minister is that he will be assessed long before then – in a major set of elections in May throughout the UK. He tried to protest, perhaps excessively, that they are about who runs local authorities, and who runs the devolved administrations in Holyrood or Cardiff – and not a verdict on Westminster.
Accurate – to some extent. But even though he may not want to acknowledge it, No 10 will be evaluated by those elections too.
This did not stop Sir Keir stating that there were no situation under which he would resign, should one of his colleagues contested his leadership for the job, if those elections be disastrous for Labour.
He tried to rationalise his unpopularity by saying the public was reasonably eager for things to improve. He aimed to persuade the interviewer, and the nation, that 2026 would be distinct.
The economic situation would recover in the face of rising unemployment, he argued, when policies the government implemented during their first turbulent year began to take effect.
His central argument is that in 2026 the country will "turn the corner".
The prime minister may have communicated with greater vigour than observed from him for a some time – more relaxed, maybe, with more time to talk.
However, in spite of facing pressure from various quarters for a bolder strategy, with much more political vision, more vigour, more pace and more urgency, his points were repeated ones.
When he finds himself in considerable political trouble, should he consider a different script?
No government, and especially not one that has been struggling in the polls for an extended period, has everything its as desired.
The Prime Minister's challenges are not just because government is hard, but because he and his colleagues have made mistakes, including in the last few weeks.
The prime minister admitted that he regretted saying he was "pleased" to see the return of the Egyptian-British activist Alaa Abd El Fattah to the UK following an outcry when past remarks he'd previously made – such as calls for Zionists and police to be killed – came to light.
Sir Keir blamed "procedures" for not catching what the activist had said before – a fancier way of saying it wasn't his responsibility.
And he is courting obvious political perils as the year unfolds. His close relationship with the US president acquires a new complication after Trump's intervention on Venezuela.
Based on years of interviewing Sir Keir Starmer, a ex- human rights lawyer who was against the war in Iraq, over many years, the thought he would be at ease with such action seems far-fetched.
He stated he was a "lifelong proponent of international law" but we "simply haven't got the entire story at the moment".
Opponents wanted him to condemn it before the interview. And the administration is expected to face more pressure to give an clear view in Parliament in the coming days.
There has also consistently been simmering desire in the Labour ranks to undo or remake some of the outcomes of Brexit.
The PM rejects he's heading in that direction, but his new more concrete pledge to align more closely with the single market – the giant economic European trading zone – will likely provoke howls that he is reneging on his vow never to try to reverse the choices that flowed from Brexit.
A move to align with more of the single market will please many on his side of the party, but it is simple material for Reform and the Conservatives to
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