"I'll be sitting in the same office by 2027," the Prime Minister declared, adding that if the discussion was successful, he might welcome the interviewer into Number 10 for another talk in 2026.
For a PM, there's never any downtime for prime ministers. In the hour before our chat started, the PM had been speaking with Ukraine's Volodymyr Zelensky and working to understand what on earth had occurred in Venezuela, where his big political chum, US President Donald Trump, had recently attacked and captured its leader, Nicolás Maduro.
By the time our lengthy talk, which was far more extended than usual, had finished, Maduro had been formally accused in New York.
With the new year begins, Starmer appears to have had a kind of a reboot. Perhaps even just a little relaxation with his family at Chequers, the prime minister's official country residence.
This appeared to have left him in better spirits than at the sluggish end of 2025, a awful political year for him.
But are he and his colleagues kidding themselves if they reckon his fortunes are about to get better?
The harsh reality for the leader is that numerous of his colleagues think he's underperforming at his job. Some of them would rather take a risk and oust him this year.
But Sir Keir was having none of it during our conversation on Saturday morning.
Multiple times he insisted he'd be "evaluated at the general election", arguing no one would remove his five-year mandate from him – despite the fact that the most effective strategy of preventing Nigel Farage and Reform UK entering No 10 may be for Labour to replace leader.
"This is the struggle of our generation and I intend to be at the forefront," he said.
The challenge for the prime minister is that he will be scrutinised long before then – in a mega set of elections in May across the UK. He sought to contend, perhaps excessively, that they are concerning who runs local authorities, and who runs the devolved administrations in Holyrood or Cardiff – and unrelated to Westminster.
Accurate – in part. But although he may not want to admit it, No 10 will be held accountable by those elections too.
Despite this, Sir Keir suggesting that there were no scenario under which he would walk away, should one of his MPs contested his leadership for the job, should those elections be disastrous for Labour.
He sought to rationalise his unpopularity by saying the electorate was naturally eager for things to improve. He tried to persuade me, and the nation, that this year would be distinct.
The economic situation would improve notwithstanding rising unemployment, he claimed, when strategies the administration implemented during their first choppy year began to take effect.
His big message is that this year the country will "reach a turning point".
The PM may have communicated with greater vigour than observed from him for a while – calmer, perhaps, with more time to talk.
But despite facing pressure from many directions for a bolder strategy, with much more political direction, more vigour, more pace and more urgency, his explanations were well-known ones.
When he finds himself in this much political difficulty, does he need a new narrative?
No government, and certainly not one that has been unpopular for an extended period, has everything its as desired.
Sir Keir's challenges are not only because government is hard, but because he and his colleagues have faltered, including in the recent past.
The prime minister expressed regret that he was sorry for saying he was "happy" to see the return of the Egyptian-British activist Alaa Abd El Fattah to the UK after an backlash when past remarks he'd made in the past – including calls for Zionists and police to be killed – resurfaced.
Sir Keir blamed "procedures" for failing to identify what the activist had said before – a more diplomatic way of saying not my fault.
And he is courting obvious political perils as the year unfolds. His alliance with the US president takes on a new risk after Trump's strikes on Venezuela.
Having interviewed Sir Keir Starmer, a ex- human rights lawyer who was against the war in Iraq, over his career, the notion he would be at ease with such action seems unlikely.
He told me he was a "longtime proponent of international law" but we "just do not have the complete details at the moment".
Opponents called for him to criticise the action before the interview. And the government is likely to face more pressure to give an explicit view in Parliament in the near future.
There has also consistently been bubbling desire in the Labour ranks to reverse or renegotiate some of the outcomes of Brexit.
The PM denies he's heading in that direction, but his new specific plan to align more closely with the European trading bloc – the vast economic European market – will probably elicit howls that he is reneging on his vow never to try to reverse the results that followed Brexit.
A commitment to cosy up to more of the single market will delight some on his side of the party, but it is simple material for Reform and the Conservatives to
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