Starmer's Final Act: How a £5 Billion Defence Black Hole and a Lame-Duck Prime Minister Handed Kemi Badenoch the PMQs She Had Been Waiting For

On Wednesday, July 1, 2026, Prime Minister Keir Starmer stood at the despatch box for what may be one of his final sessions of Prime Minister's Questions before a Labour leadership contest installs his successor by September. He was defending a defence spending plan that his own Defence Secretary had resigned over three weeks earlier, that military chiefs have publicly described as insufficient, that contains a £4.7 billion funding gap with no plan for how to fill it, and that his own minister for the Middle East publicly condemned in the same week it was published. Across the chamber, Conservative leader Kemi Badenoch was ready.

Accusing the outgoing Prime Minister of leaving this mess to his successor, Badenoch delivered a characterisation of the situation that cut through the government's framing with surgical precision. His limited plan for defence investment, she said, has completely unravelled because he hasn't found the money to pay for it.

It is hard, on the available evidence, to dispute that assessment.

The Collapse of a Premiership: From Landslide to Resignation in Twenty-Three Months

To understand the full weight of Wednesday's exchange, you have to understand what the past two months have done to Keir Starmer's government. Less than two years after Labour won one of the most commanding parliamentary majorities in British electoral history — returning to power after fourteen years in opposition with 412 seats and a net swing that would have satisfied almost any political strategist in the country — Starmer resigned as party leader on June 22, 2026, outside 10 Downing Street, under pressure from his own parliamentary party that had become unmistakable and irresistible.

The collapse was not sudden. It was the accumulated weight of a series of crises and controversies that each individually might have been survivable but that together produced an arithmetic of lost confidence that could not be reversed. The October 2024 Budget had introduced the largest tax rises since 1993 and set the overall tax burden on a trajectory to its highest level in recorded history — necessary in fiscal terms, catastrophic in political ones. The appointment of Peter Mandelson as US Ambassador, which began as a piece of diplomatic pragmatism, became a reputational disaster when the Epstein files released in September 2025 revealed the extent of Mandelson's relationship with convicted sex offender Jeffrey Epstein. The Chief of Staff Morgan McSweeney resigned in February 2026 after taking responsibility for the appointment. Director of Communications Tim Allan followed the next day. Mandelson's failure of security vetting — a fact concealed from Starmer himself, or at least so Starmer claimed — became the subject of parliamentary questions that dogged the government for months.

The 2026 local elections in May were the political equivalent of a verdict. Labour lost 1,496 council seats. Reform UK gained 1,453 new councillors, mostly from Labour's former base, and took control of 14 councils. The elections were widely interpreted as a referendum on Starmer personally. Internal polling showed that in England, only 5 per cent of those who had voted Labour in 2024 switched to Reform — but 32 per cent switched to the Greens or the Liberal Democrats, a reading of the results that directly contradicted the dominant internal narrative that the threat came from the populist right rather than from the progressive left.

The defence crisis was the final accelerant. On June 11, just before the long-delayed Defence Investment Plan was due to be published, Defence Secretary John Healey and Armed Forces Minister Al Carns resigned, citing disagreement with the very limited spending increase that the Treasury had authorised. The Defence Investment Plan had already been delayed for nine months after the Ministry of Defence identified, belatedly, that it faced a £28 billion funding gap over the next four years to meet existing commitments and emerging NATO requirements. When the plan eventually appeared, it promised £15 billion in additional defence spending by the end of the decade — £1.5 billion more than Healey had been offered before he resigned, but still £13 billion short of what the military had said was the minimum.

Andy Burnham's victory in the Makerfield by-election on June 18 — he stood for parliament explicitly to challenge Starmer — made the internal numbers impossible to manage. On June 22, Starmer announced his resignation. He will remain as Prime Minister until the leadership contest concludes, with nominations opening July 9 and a new leader expected by the time parliament returns from its summer recess in September.

The Defence Investment Plan: What Was Announced and What Is Missing

On Tuesday, July 1, Starmer published the Defence Investment Plan that had been so long awaited and so controversially incomplete. The headline figure was £15 billion in additional defence funding by the end of the decade, equivalent to raising total defence spending to £80 billion annually by 2029. At that level, the UK will be spending approximately 2.7 per cent of GDP on defence by 2030 — the year NATO has assessed as the date by which Russia could present a direct military threat to allied territory.

The problem is NATO's formal target, endorsed by all member states at the Hague summit in June 2025, is 3.5 per cent of GDP by 2035. At 2.7 per cent in 2030, the gap between where Britain is heading and where its obligations require it to be is not marginal. It is categorical. Former Defence Secretary Healey himself said so from the back benches on the day the plan was published: European security is at stake. The PM has said today that 3% must be the number one priority for the next spending review. We need a target date for 3% and a clear, credible funding plan to meet our NATO commitment for 3.5% on defence by 2035.

More immediately damaging than the gap between the plan and NATO's target is the gap between the plan's numbers and its funding. The £15 billion figure includes £4.7 billion that the Treasury has not yet identified a source for. The funding will be decided at the next Budget — meaning the incoming prime minister, most likely Andy Burnham, will walk into Downing Street in September facing a choice between higher taxes, more borrowing, or further cuts to other spending programmes in order to fund commitments his predecessor announced but did not finance. Defence Minister Luke Pollard told parliament that Burnham had only found out about the £4.7 billion gap when the Treasury figures were published on Tuesday — a detail that, if accurate, speaks volumes about the coordination, or lack of it, in Starmer's caretaker government.

The plan has also been funded in part by cutting energy and transport projects — a decision that has generated internal Labour dissent of its own. Hamish Falconer, the Minister for the Middle East and North Africa, publicly described himself as disappointed by the uncertainty about the A46 Newark Bypass widening scheme, and said he would be seeking an urgent meeting with the incoming Prime Minister, incoming Chancellor, and incoming Transport Secretary to challenge the decision. A sitting minister, in a government whose leader has already resigned, publicly calling for a meeting with his leader's successor about a decision that same leader just made is an illustration of the governing authority that Starmer's caretaker status has produced. The TSSA union general secretary Maryam Eslamdoust went further, saying the decisions were alarming and that taxpayers' money is being diverted away from Britain's priorities.

Badenoch's Attack: PMQs as a Political Autopsy

Against that backdrop, Wednesday's Prime Minister's Questions was an unusually clean encounter between a Prime Minister in his final weeks and an opposition leader who has been waiting for exactly this moment. Badenoch did not need to construct an attack. The facts were the attack.

She accused Starmer of leaving this mess to his successor. She said his limited plan for defence investment had completely unravelled because he hadn't found the money to pay for it. She cited the former head of the armed forces making it known that the military needed a minimum of £28 billion. She framed the entire exercise as a Prime Minister who had announced a commitment he could not honour, resigned before having to honour it, and left the bill for his successor to pay.

That framing is not entirely fair — the £28 billion figure represents what the MoD would ideally have, and the Defence Investment Plan does represent a real, if inadequate, increase in defence spending over the baseline. But in the context of a government whose Defence Secretary resigned specifically over the inadequacy of the spending increase, whose military chiefs have been publicly critical of the plan's ambition, and whose outgoing Prime Minister is weeks from leaving office, the political argument is powerful regardless of its technical completeness.

Badenoch also turned the question of the succession against the government directly. Having publicly written on X that the country is not being governed and Labour say there won't be a Prime Minister till September, she asked why Britain must wait for weeks to appoint a new prime minister. She also said that neither Starmer, on a farewell tour, nor Burnham, wanting a summer holiday, is thinking about our national security, and that we need to cut welfare and fund our military.

The specific suggestion — cutting welfare to fund the military — is the Conservative Party's clearest statement of the fiscal trade-offs it would make. It is also, politically, a deliberate attempt to use the defence funding gap to insert Conservative supply-side economics into a Labour debate about security priorities. Whether that framing gains traction with the public will depend in part on how Andy Burnham positions himself on defence in the leadership contest.

Andy Burnham and the Inheritance

The man most likely to inherit this situation is Andy Burnham, the former Greater Manchester Mayor who won the Makerfield by-election on June 18, arrived in London on June 22 on the day of Starmer's resignation, and is so far the only declared candidate for the leadership. Wes Streeting, who had been seen as his most likely rival, endorsed Burnham instead. Nominations open July 9 and close July 16. If Burnham is the only candidate, the result could be confirmed without a full contest. If other candidates enter, a full contest would be decided before parliament returns in September.

Starmer himself warned Burnham, in a message that was more instruction than advice, not to rip up his defence spending plans. The incoming prime minister, Starmer told parliament, will be judged by history on whether he continues the trajectory of defence investment. It is an unusual thing for an outgoing prime minister to issue public warnings to his likely successor in the middle of a leadership contest, and it reflects the peculiar dynamic of a caretaker government still making decisions that will bind a successor who has not yet formally taken office.

The £4.7 billion gap is the most immediate test Burnham will face if he reaches Number 10. He will have to decide, at an early Budget that will itself set the political tone of his premiership, how to finance the commitment his predecessor announced. Raise taxes — deeply unpopular. Borrow more — contested and constrained. Cut other spending — exactly the kind of decision that has driven Labour's support to the Greens and the Liberal Democrats. Or revisit the commitment itself — which would invite exactly the kind of attack from Badenoch that Wednesday's PMQs previewed.

The Bigger Picture: A Security Challenge Without a Stable Government

The political theatre of a lame-duck Prime Minister defending an underfunded defence plan at his last PMQs before a leadership contest is a compelling story in its own right. But the context within which it is happening is grimmer than any single political exchange can fully capture.

Russia's war in Ukraine has entered its fifth year. NATO's June 2025 Hague summit set the 3.5 per cent GDP target and put a date — 2030 — on the Russian military threat assessment. The European security environment has not been more precarious since the Cold War. Britain's position in NATO as the second-largest military spender among European allies carries expectations that the Defence Investment Plan does not obviously meet. The Public Accounts Committee has already reported that the nine-month delay to the DIP itself has undermined the UK's credibility with NATO allies and confidence within the defence industrial base.

Badenoch's characterisation — that the Labour defence boost is unravelling — is, in the context of all of this, not merely a piece of political point-scoring. It is a description of a real governance failure: a government that announced an intention, delayed the plan to implement it, accepted the resignation of the minister responsible for it, published a version that falls billions of pounds short of the military's stated minimum requirement, and then announced that the funding for a significant portion of what was committed had not yet been identified.

It would be unravelling even if there were a Prime Minister with full authority to fix it. At the moment, there is not.

Sources

LBC — Badenoch accuses Starmer of leaving defence spending 'mess to his successor' amid £5 billion black hole: https://www.lbc.co.uk/article/badenoch-attacks-starmer-pmqs-defence-spending-5HjdcNY_2/

HuffPost UK — Minister Criticises Spending Cuts to Pay for Defence Boost in Another Blow for Starmer (June 30, 2026): https://www.huffingtonpost.co.uk/entry/defence-spending-transport-starmer-falconer_uk_6a43c9a1e4b0d6c25f53ac7b

CNN — June 22, 2026: Keir Starmer resignation, UK to get sixth PM in seven years, as Andy Burnham likely to replace him: https://edition.cnn.com/2026/06/22/world/live-news/keir-starmer-uk-pm

Al Jazeera — Why has Keir Starmer resigned as UK prime minister, and who will take over? (June 22, 2026): https://www.aljazeera.com/news/2026/6/22/why-has-keir-starmer-resigned-as-uk-prime-minister-and-who-will-take-over

Wikipedia — 2026 Labour Party leadership crisis: https://en.wikipedia.org/wiki/2026_Labour_Party_leadership_crisis

Wikipedia — Premiership of Keir Starmer: https://en.wikipedia.org/wiki/Premiership_of_Keir_Starmer

Institute for Government — How do Labour Party leadership contests work? (June 22, 2026): https://www.instituteforgovernment.org.uk/explainer/labour-party-leadership-contests