"I will remain in the same position by 2027," the Prime Minister stated, joking that if our conversation went well, he might welcome the interviewer into his official residence for another conversation next year.
For a PM, there's never truly time off for leaders. Shortly before our chat started, the PM had been in calls with Ukrainian President Volodymyr Zelensky and working to work out exactly what had happened in Venezuela, where his close friend, US President Donald Trump, had recently attacked and captured its leader, Nicolás Maduro.
Once our interview, which was far more extended than typical, had concluded, Maduro had been indicted in New York.
With the year starts, Sir Keir appears to have had a kind of a refresh. Perhaps even just a bit of downtime with loved ones at Chequers, the prime minister's official country residence.
This appeared to have left him in improved morale than at the saggy end of 2025, a awful annus horribilis for him.
Yet, are he and his supporters deluding themselves if they think his standing are about to turn around?
The harsh truth for the leader is that numerous of his colleagues think he's underperforming at his job. A faction of them would sooner take a risk and remove him in 2026.
But Sir Keir was rejecting the idea during our conversation on Saturday morning.
Multiple times he stated he'd be "evaluated at the poll", arguing nobody would remove his electoral mandate from him – despite the fact that the most effective strategy of stopping Nigel Farage and Reform UK getting to No 10 may be for Labour to switch leader.
"We are in the struggle of our lifetime and I plan to lead us," he affirmed.
The problem for the PM is that he will be judged long before then – in a mega set of elections in May throughout the UK. He attempted to contend, perhaps excessively, that they are concerning who runs councils, and who runs the devolved administrations in Holyrood or Cardiff – and unrelated to Westminster.
Accurate – up to a point. But although he may be reluctant to admit it, No 10 will be evaluated by those elections too.
This did not stop Sir Keir stating that there were no scenario under which he would resign, even if one of his colleagues ran against him for the job, if those elections be disastrous for Labour.
He sought to explain his low poll ratings by saying the voters was reasonably eager for things to get better. He aimed to assure the interviewer, and the nation, that 2026 would be different.
The economic situation would strengthen despite rising unemployment, he said, when plans the government enacted during their initial rocky year began to show results.
His central argument is that soon the country will "reach a turning point".
The prime minister may have spoken with greater vigour than observed from him for a some time – calmer, maybe, with more time to talk.
However, in spite of facing demands from many directions for a bolder approach, with greater political direction, more dynamism, more pace and more immediacy, his arguments were repeated ones.
When he finds himself in this much political trouble, should he consider a change of tack?
No administration, and certainly not one that has been unpopular for an extended period, gets everything its own way.
Sir Keir's challenges are not only because government is difficult, but because he and his colleagues have faltered, including in the recent past.
The PM admitted that he was sorry for saying he was "delighted" to see the return of the Egyptian-British activist Alaa Abd El Fattah to the UK after an outcry when past remarks he'd made in the past – such as calls for Zionists and police to be killed – surfaced.
Starmer blamed "procedures" for not realising what the activist had said before – a more diplomatic way of saying not my fault.
And he is inviting clear political dangers as the year gets going. 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 a long period, the thought he would be comfortable with such action seems unlikely.
He asserted he was a "career-long proponent of international law" but we "simply do not have the complete details at the moment".
Opponents called for him to criticise the action prior to the interview. And the administration is likely to face increased demands to give an clear view in Parliament in the near future.
And there has long been simmering desire in the Labour ranks to revisit some of the consequences of Brexit.
Sir Keir denies he's doing that, but his new more concrete plan to integrate further with the European trading bloc – the vast economic European trading zone – will likely trigger howls that he is reneging on his vow never to try to overturn the results that flowed from Brexit.
A commitment to align with more of the single market will satisfy a faction on his own side, but it is prime ammunition for Reform and the Conservatives to