"I'll be sitting in this office by 2027," Starmer stated, noting that if our interview was successful, he might invite the interviewer into Number 10 for a follow-up talk next year.
There is never any break for those in the top job. Shortly before the interview began, the PM had been speaking with Ukraine's Volodymyr Zelensky and trying to understand exactly what had occurred in Venezuela, where his big political chum, US President Donald Trump, had recently launched a strike against and detained its leader, Nicolás Maduro.
When the discussion, which was far more extended than normal, had concluded, Maduro had been indicted in New York.
As the year commences, Starmer appears to have had a degree of a reboot. Perhaps even just some relaxation with the family at Chequers, the prime minister's official country residence.
That certainly seemed to have resulted in better spirits than at the sluggish end of 2025, a dreadful annus horribilis for him.
But are he and his allies being unrealistic if they believe his fortunes are about to turn around?
The grisly reality for the leader is that numerous of his colleagues think he's not very good at his job. Several of them would rather take a risk and get him out in 2026.
However Starmer was having none of it in the interview on Saturday morning.
On several occasions he insisted he'd be "evaluated at the next election", maintaining no one would remove his term from him – even if the best chance of preventing Nigel Farage and Reform UK reaching No 10 could be for Labour to switch leader.
"We are in the battle of our lifetime and I intend to guide the party," he said.
The issue for the prime minister is that he will be assessed long before then – in a major set of elections in May across the UK. He attempted to contend, maybe too much, 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 be reluctant to admit it, No 10 will be evaluated by those elections too.
Despite this, Sir Keir stating that there were no situation under which he would resign, should one of his MPs contested his leadership for the job, should those elections be catastrophic for Labour.
He attempted to rationalise his low poll ratings by saying the public was naturally impatient for things to get better. He aimed to assure the interviewer, and the public, that the coming months would be different.
The economy would recover in the face of rising unemployment, he argued, when policies the government enacted during their first choppy year began to bear fruit.
His central argument is that this year the country will "turn the corner".
The PM may have communicated with renewed vitality than I've seen from him for a some time – more relaxed, maybe, with a longer slot to talk.
However, in spite of facing pressure from within his own party for a more decisive strategy, with much more political vision, more urgency, more speed and more urgency, his arguments were familiar ones.
When he finds himself in such significant political difficulty, does he need a new narrative?
No government, and especially not one that has been unpopular for many months, gets everything its as planned.
Sir Keir'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 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 following an controversy when comments he'd made in the past – including calls for Zionists and police to be killed – surfaced.
Starmer attributed it to "the system" for failing to identify 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 progresses. His alliance with the US president takes on a new risk after Trump's intervention on Venezuela.
Having interviewed Sir Keir Starmer, a former human rights lawyer who was against the war in Iraq, over many years, the thought he would be content with these events seems unlikely.
He asserted he was a "longtime proponent of international law" but the public "just lack the complete details at the moment".
Some wanted him to denounce it prior to the interview. And the government is likely to face increased demands to give an clear view in Parliament in the coming days.
And there has long been growing tension in the Labour party to undo or remake some of the outcomes of Brexit.
The PM rejects he's heading in that direction, but his new firmer plan to integrate further with the EU's single market – the giant economic European trading zone – will probably provoke accusations that he is going back on his promise never to try to undo the results that followed Brexit.
A move to align with more of the single market will delight many on his own side, but it is simple material for Reform and the Conservatives to
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