On 11 June 2026, John Healey resigned as Defence Secretary, accusing Prime Minister Keir Starmer and Chancellor Rachel Reeves of failing to commit the resources needed to keep the country safe. It was not a quiet departure. In his resignation letter, Healey wrote that the unpublished Defence Investment Plan (DIP) “falls well short of what is required for defence and the country at this dangerous time”. He added: “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 letter went on to warn that without a proper plan, he would be “forced to make decisions that would reduce the readiness of our Forces and increase the risk to personnel on operations, and could make the country less safe”. Healey is a veteran Labour politician, widely respected across parties – even Nigel Farage’s right-hand man Richard Tice called him “widely respected”. His resignation is seen as far more damaging than previous cabinet exits because it strikes at the most fundamental duty of a prime minister: national security.
The immediate context is a long-running battle over defence spending. After the Strategic Defence Review, the armed forces estimated they needed £28 billion just to maintain current capabilities. The Treasury, however, offered only £10 billion of extra funding – a gap that Healey deemed unacceptable. Starmer himself had said only a week earlier that he believed “there could be an attack by Russia on Nato as soon as 2030”, and had repeatedly stated that his first duty was to keep the country safe. The resignation, coming just before the publication of the DIP (expected next week) and a crucial Nato summit in Turkey in early July, leaves the government scrambling.
“Explains why John Healey resigned as Defence Secretary and what it means for Starmer's leadership and UK defence spending.”
For UK readers, the stakes are practical. The resignation raises questions about the readiness of the armed forces, the credibility of the government’s defence commitments, and the stability of Starmer’s leadership. The opposition will use the timing to attack Labour, especially with the Makerfield by-election looming. More broadly, the crisis highlights the tension between fiscal restraint and the need to invest in defence at a time of rising global threats. If the DIP is seen as inadequate, Britain could face embarrassment among Nato allies and potential gaps in its ability to protect itself.
Q: Why did John Healey resign? Healey resigned because he believed the Defence Investment Plan did not provide enough money for the armed forces. He said it forced him to make decisions that would reduce readiness and increase risk to personnel, making the country less safe. He directly criticised Starmer and the Treasury for not committing sufficient resources.
Q: What is the Defence Investment Plan? The Defence Investment Plan (DIP) is a government document outlining future defence spending. It has not yet been published, but reports suggest it offers only £10 billion of extra funding, far less than the £28 billion the military says it needs just to stand still. Healey described it as falling “well short” of what is required.
Q: Could this end Keir Starmer’s leadership? Many commentators believe Healey’s resignation is a terminal blow. Because it comes from a loyal, centrist figure over the core issue of national security, it is seen as more damaging than other resignations. Some analysts argue that Healey’s letter is effectively a demand for a change of leader, and that Starmer may not recover.
What happens next is uncertain. The DIP is due to be published within days, and the Nato summit in Turkey in early July will put further pressure on the government. Starmer must now defend both his defence plan and his own position, while Labour MPs and the public watch closely. Whether the Prime Minister can survive this crisis – and what it means for UK defence – will become clearer in the coming weeks.