British politics was rocked Thursday when Defense Secretary John Healey resigned from Prime Minister Keir Starmer’s government, accusing the administration of failing to provide the military with the funding needed to confront growing threats from Russia and meet NATO’s increasingly ambitious defense goals.
The resignation delivers one of the most serious blows yet to Starmer’s premiership and comes just weeks before a critical NATO summit where alliance leaders are expected to focus heavily on military readiness, defense spending, and the long-term challenge posed by Russia.
In a sharply critical resignation letter, Healey argued that Britain’s defense ambitions are not being matched by actual financial commitments.
“This new era for defence required further investment through the Defence Investment Plan,” Healey wrote. “Since then, you have been unable, and the Treasury has been unwilling, to commit the resources that the nation needs to defend the country at this time of rising threats.”
The dispute centers on a growing debate that is playing out across much of Europe. Governments have repeatedly warned about the need to rebuild military capabilities after decades of post-Cold War reductions, but many are struggling to balance those goals against budget pressures and competing domestic priorities.
Healey’s frustration appears to have reached a breaking point over Britain’s long-term spending plans.
The former defense secretary argued that the United Kingdom should commit to spending 3 percent of its gross domestic product on defense by 2030. According to Healey, the government’s current trajectory would only bring spending to approximately 2.68 percent by the end of the decade.
To critics of the government’s approach, that gap is significant.
Retired British Army Major Andrew Fox of the Henry Jackson Society said the resignation sends an alarming message both at home and abroad.
“The Government cannot warn about Russia, Iran and China, then produce a Defence Investment Plan that leaves the Armed Forces short of the money, people, stockpiles and industrial capacity needed to meet that threat,” Fox said.
He added that a defense secretary resigning over national security funding raises questions among allies, adversaries, and military personnel about Britain’s commitment to its stated defense objectives.
What makes Healey’s departure particularly damaging for Starmer is that he had been considered one of the prime minister’s most loyal allies. Throughout recent political turbulence within the Labour Party, Healey was often viewed as a dependable supporter of Starmer’s leadership.
Now, his resignation amplifies concerns about divisions inside the government at a time when Starmer is already facing pressure following disappointing election results and growing dissatisfaction within Labour’s ranks.
The timing could hardly be worse.
NATO leaders are preparing to gather in July amid mounting concerns about European defense readiness. President Donald Trump has continued pressing European allies to shoulder a greater share of the burden for their own security, while Russia’s military posture remains a central concern for alliance planners.
Healey himself had recently assured Parliament that Britain’s Defence Investment Plan would be unveiled before the summit. According to reports, he learned the final details of the government’s spending settlement only days before deciding to resign.
The controversy also arrives as broader questions emerge about Europe’s defense capabilities. Recent reports that the Future Combat Air System, a major sixth-generation fighter jet project involving France and Germany, collapsed after years of disputes have fueled concerns about Europe’s ability to deliver on ambitious military modernization plans.
Political opponents quickly seized on Healey’s resignation.
Robert Jenrick, now aligned with Reform UK, praised Healey’s decision and placed blame directly on Starmer and Chancellor Rachel Reeves.
“Good on Healey. Shame on them,” Jenrick said. “Reeves and Starmer should go too.”
Liberal Democrat leader Ed Davey likewise argued that the resignation underscores the need for substantially greater defense investment.
Britain remains one of NATO’s most important military powers and continues to play a leading role in European security. However, recent warnings from Parliament’s own defense committee have highlighted growing concerns about whether the country’s armed forces possess the manpower, equipment, and resources necessary to sustain that position.
Healey’s resignation has now turned those concerns into a full-scale political crisis.
