Governments rarely explode in a single moment. They fray. They wobble. They insist everything is fine. And then, suddenly, they’re in freefall. Keir Starmer’s administration looks perilously close to that second act.
The spark was the scandal engulfing former Washington ambassador Peter Mandelson and his ties to the late sex offender Jeffrey Epstein. The fallout has been swift and bruising. First went Morgan McSweeney, Starmer’s chief of staff and the architect behind Mandelson’s appointment, falling on his sword and taking “full responsibility”. Then came the departure of press secretary Tim Allan. The exits began to feel less like coincidence and more like gravity.
Sarwar breaks ranks
The real rupture arrived live and unscripted. Anas Sarwar, once one of Starmer’s closest allies, detonated his support in a televised press conference. Eighteen months ago, the two men were politically inseparable. Now, Scotland’s Labour leader has cut the rope, declaring the situation in Downing Street “not good enough” and saying “too many mistakes” had been made at the top. Then came the line that echoed far and wide: it was time for Starmer to go.
Sarwar’s intervention may prove the most consequential blow yet, not because it toppled the Prime Minister overnight, but because it accelerated a conversation that had been simmering for months. With Scottish elections looming in three months, Sarwar framed his rebellion as loyalty to Scotland over party hierarchy.
Public unity, private panic
as Sarwar spoke against Starmer, senior Labour figures scrambled onto social media to pledge loyalty to their embattled leader. The optics were unmistakable: public unity, private panic.
Starmer, meanwhile, faced down his MPs at a packed meeting of the Parliamentary Labour Party. He was greeted with applause, even a standing ovation by day’s end. “I’m not stepping down,” he told them. “Every fight I’ve been in, I have won.”
He cast himself as battle-hardened, defiant, unwilling to “plunge us into chaos, as others have done.” It was a speech heavy on resolve, light on contrition.
While the Prime Minister addressed MPs, Health Secretary Wes Streeting, long speculated as a potential leadership challenger to Sir Keir, made an unusual move, publishing excerpts of his messages with Lord Mandelson. Streeting said the step was intended to counter a “weekend of smear and innuendo” suggesting he had something to hide.
“Contrary to widespread reports, I was not a close friend of Peter Mandelson,” he wrote in The Guardian, “but I will not deny my actual association with him either.” The messages also show Streeting taking aim at the government, criticising it for having “no [economic] growth strategy.”
In Starmer’s support, Chancellor Rachel Reeves reminded colleagues that voters handed Starmer a “huge mandate” just 18 months ago. Angela Rayner warned against “factional games”. Streeting himself told broadcasters, “It has not been the best week for the government. Give Keir a chance.”
But chances in politics are finite. Behind the carefully staged cabinet solidarity lies something far more fragile. Around half a dozen Labour backbenchers have already broken cover to call for Starmer’s resignation. Leadership speculation, once confined to Westminster whispers, is now dominating the conversation. And some of the very ministers now lining up to defend him are understood to be among those who, through allies, had previously made it publicly known that they warned the leadership against appointing the so-called “Prince of Darkness” in the first place.
For now, Starmer stands applauded, defended, and defiant. But governments do not collapse because of one speech or one resignation. They collapse when authority drains away, drip by drip, until loyalty becomes conditional and applause sounds hollow.
This week ended with a standing ovation. Next week may not.
If, in the foreseeable future, Starmer were to resign or be pushed out, the handover would be swift and pragmatic. Governments don’t pause for reflection when authority crumbles; they act to stabilise the ship. All eyes are turning to a small cadre of senior figures now seen as immediately viable: Angela Rayner, Wes Streeting, and increasingly, Shabana Mahmood.
This is no longer idle media speculation. Betting markets and prediction platforms are starting to treat the scenario seriously. The Guardian reported that a site promoting Ashton MP Angela Rayner’s Labour leadership bid briefly went live in January, with the domain angelaforleader.co.uk registered on January 27. Rayner’s team called the site fake, describing it as an attempt to “undermine” her.
On the other hand, While Mahmood isn’t viewed as the frontrunner, she consistently ranks in the second tier of contenders. Should she ascend to Downing Street, Britain would quietly welcome its first Muslim prime minister, a historic milestone, remarkable in significance even if low on fanfare.
Ahmad Yunas Samad, British social scientist and Emeritus Professor at Bradford University
The way the Mandelson–Epstein scandal is unfolding in UK politics is that it has moved beyond a question of poor judgment or simply associating with a sex offender. It has escalated into concerns about whether government secrets could have been compromised and potentially shared with powerful billionaires for profit. That is a far more serious allegation.
In one sense, this reflects the Blairite wing of the Labour Party. Many of Keir Starmer’s inner circle have Blairite roots, and Mandelson was a trusted figure within that network. That is where the issue of judgment comes in and it also exposes deeper cracks within the party. Different factions are now using this controversy to widen existing divisions.
Two senior Downing Street aides resigned in quick succession, escalating the crisis further when Anas Sarwar urged Starmer to quit, even as cabinet ministers publicly rallied behind him. But the real test will come if Labour performs disastrously in upcoming by-elections or local elections. At that point, it is impossible to predict who might turn against him or how events might unfold.
Others in the Labour Party may be thinking more strategically about timing, perhaps waiting until after the by-elections or local elections. If results are catastrophic, some may conclude it is better to remove Starmer sooner rather than risk entering the next general election cycle under a weakened leader.
Labour’s crisis sits atop deep, structural divisions, from Gaza to economic policy and accusations of austerity. Starmer’s break with Jeremy Corbyn marked a decisive shift toward the party’s Blairite wing, alienating many on the left. With Green figures claiming disaffected members are defecting, fears of fragmentation are growing, a calculation that may have influenced Sarwar’s move.
Sir John Curtice, British political scientist and professor
We may well be looking at one of the biggest scandals in post-war British politics, and the question everyone is asking Keir Starmer is: “Why did you really appoint this man?” After all, he had been sacked twice for allegedly unethical behaviour.
The central issue is whether this was ever a sensible choice. To give her due credit, Kemi Badenoch asked the crucial question, and she asked it three times. She refused to be deflected, and Starmer ultimately had to admit that he knew, something he had not previously stated so explicitly.
All of this has unfolded at a moment when the Prime Minister was already politically weakened. The Conservative government’s Partygate scandal undoubtedly had a serious impact, but it occurred when the Tories’ poll ratings were beginning to recover and they were still marginally ahead. This controversy, by contrast, has erupted at a time when Labour, and Starmer personally, are already deeply unpopular in the polls. For many voters, it is likely to confirm rather than change their view of him. The question now is whether he will be pushed out.
The fundamental criticism of Starmer’s leadership has long been that he has struggled to articulate a clear sense of direction; a compelling vision for where he wants to take the country. Ministers lining up behind him to insist he should remain in post may project unity, but it also goes to prove how weak Starmer's position is.
That said, Sarwar’s intervention has not yet been followed by others. In real terms, the tipping point would likely come either through a wave of cabinet resignations, effectively paralysing the government, or through MPs telling the chief whip they can no longer support the Prime Minister. Historically, this has not been how the Labour Party operates — but nor has it previously found itself polling at 19 or 20 per cent.
For now, all the leadership hopefuls may be prepared to stand behind the Prime Minister because the timing does not suit them. On the one hand, they are positioning themselves; on the other, unlike Anas Sarwar, they are not facing an election on 7 May, and therefore have less immediate incentive to force a confrontation.