"I will be positioned in this office by 2027," the Prime Minister remarked, noting that if our conversation proceeded smoothly, he might welcome us into Number 10 for a follow-up conversation in 2026.
There is never any break for leaders. Just an hour before the interview began, Sir Keir had been in calls with Ukrainian President Volodymyr Zelensky and attempting to decipher exactly what had transpired in Venezuela, where his big friend, US President Donald Trump, had just attacked and captured its leader, Nicolás Maduro.
When our lengthy talk, which was considerably lengthier than typical, had ended, Maduro had been charged in New York.
As the year commences, the Prime Minister appears to have had a kind of a refresh. Perhaps even just a bit of relaxation with his family at Chequers, the prime minister's rural getaway.
This appeared to have put him in a more positive mood than at the difficult tail end of 2025, a awful year politically for him.
Yet, are he and his colleagues deluding themselves if they reckon his fortunes are set to turn around?
The grisly truth for the prime minister is that numerous of his colleagues are convinced he's not very good at his job. Some of them would sooner take a risk and get him out in 2026.
However Sir Keir was dismissing such talk when we spoke on Saturday morning.
Multiple times he told me he'd be "assessed at the general election", arguing no one would take his term from him – despite the fact that the optimal path of halting Nigel Farage and Reform UK entering No 10 may be for Labour to switch its leader.
"This is the battle of our lifetime and I intend to lead us," he affirmed.
The challenge for the PM is that he will be scrutinised long before then – in a major set of elections in May across the UK. He sought to protest, perhaps excessively, that they are about who runs local authorities, and who runs the devolved administrations in Holyrood or Cardiff – and unrelated to Westminster.
Accurate – to some extent. But although he may be reluctant to acknowledge it, No 10 will be held accountable by those elections too.
This did not stop Sir Keir suggesting that there were no situation under which he would walk away, even if one of his MPs challenged him for the job, should those elections prove catastrophic for Labour.
He attempted to rationalise his unpopularity by saying the public was reasonably impatient for things to change. He tried to convince the interviewer, and the public, that 2026 would be distinct.
The economic situation would improve despite rising unemployment, he claimed, when strategies the government enacted during their first choppy year began to bear fruit.
His central argument is that soon the country will "reach a turning point".
The PM may have spoken with renewed vitality than observed from him for a while – more relaxed, perhaps, with a longer slot to talk.
However, in spite of encountering pressure from various quarters for a bolder approach, with increased political clarity, more urgency, more speed and more urgency, his explanations were familiar ones.
Given that he is in this much political peril, does he need a change of tack?
No government, and especially not one that has been struggling in the polls for an extended period, has everything its as planned.
Sir Keir's challenges are not only because government is difficult, but because he and his team have erred, even in the recent past.
The prime minister admitted 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 backlash when comments he'd made in the past – such as calls for Zionists and police to be killed – surfaced.
Sir Keir attributed it to "procedures" for not catching what the activist had said before – a more diplomatic way of saying it wasn't his responsibility.
And he is inviting obvious political risks as the year progresses. His friendship with the US president entails a new risk after Trump's strikes 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 content with this kind of intervention seems far-fetched.
He asserted he was a "lifelong champion of international law" but the public "simply do not have the complete details at the moment".
Opponents wanted him to criticise the action prior to we spoke. And the government is likely to face more pressure to give an clear view in Parliament in the next few days.
There has also always been simmering pressure in the Labour party to revisit some of the outcomes of Brexit.
Sir Keir rejects he's doing that, but his new more concrete commitment to align more closely with the European trading bloc – the vast economic European trading zone – will likely elicit howls that he is breaking his pledge never to try to reverse the decisions that followed Brexit.
A move to align with more of the single market will satisfy a faction on his backbenches, but it is simple material for Reform and the Conservatives to