LONDON – Andy Burnham has not taken office yet. He does not have a cabinet, a budget, or a first day at 10 Downing Street. What he does have, as of this week, is a £4.7 billion hole in the only defence investment plan his government is committed to funding.
Keir Starmer, in the final weeks of his prime ministership, published a long-delayed defence investment plan on Tuesday. It committed an additional £15 billion to Britain’s armed forces over four years – an increase framed as a historic shift in the country’s readiness against a potential Russian attack on NATO by 2030. Within hours, the accompanying budget documents revealed that nearly a third of that commitment had not yet been identified. The money was pledged. The source of the money was not.
Burnham, who is expected to replace Starmer as prime minister before the end of July, said he learned of the gap when the plan’s documentation became public. “I wasn’t in all of the discussions,” he told reporters, according to Al Jazeera. He added that the defence programme was “something that the country has to face up to very seriously” and pledged to “take my responsibilities fully to fund the defence investment plan.” He gave no indication of how.
The plan’s architects were less forthcoming about the disclosure. Defence Secretary Dan Jarvis, asked directly whether Burnham had been informed of the shortfall in advance, said only that his team had “been talking to Andy Burnham and his team about this plan.” He did not specify what had been communicated or when. Defence Procurement Minister Luke Pollard offered a more direct dismissal: “It’s not unusual for governments to make announcements saying this is what we’ll spend, and then to complete the details at the next budget.” Whether that framing will survive contact with a budget is a question the outgoing government will not have to answer.
What the £15 billion announcement obscures is that even the full amount – if all of it were found – would leave Britain well short of what military chiefs said they actually needed. Defence officials had pressed for roughly £28 billion over the same four-year horizon to move meaningfully toward NATO’s stated target of 3.5 percent of GDP in defence spending by 2035. Starmer committed to less than half of that figure. The plan set no firm date for reaching the 3 percent milestone that sits between Britain’s current level and the alliance’s longer-term goal.
The gap did not appear without warning. Britain’s own defence secretary resigned in June with a warning that the government’s approach to military spending could leave the country less safe than when Labour took office. Two defence ministers in total resigned over the proposals. That warning preceded the defence plan’s publication and anticipated, fairly precisely, the shortfall that the plan’s own documents have now confirmed. The United States has meanwhile withdrawn a third of its fighter jets from Europe, increasing the military burden on Britain and other European allies at the exact moment Britain’s own planning baseline is being questioned.
Starmer had framed the investment plan as a personal commitment to alliance credibility. He warned in June that Russia could attack a NATO member as soon as 2030, and had pledged to deliver a fully funded defence plan before the July NATO summit. The investment plan published this week is the document he was describing. The funding is not complete.
The political problem Burnham inherits is specific. His campaign for the Labour leadership – effectively uncontested since he entered the Commons through a by-election specifically arranged for his return – has emphasised economic renewal. Investment in northern England, lifting living standards, rebuilding public services eroded by years of underinvestment: these are the commitments that define his pitch to the party membership and, eventually, to the country. They compete directly with the fiscal headroom he would need to close a £4.7 billion defence gap.
He has already ruled out some of the easier routes. He said this week he would not pursue “crude cuts to benefit levels,” closing off a familiar path for finding spending reductions. Increasing borrowing would push against Labour’s own fiscal rules. New taxes would require a budget and a political argument neither he nor his team has yet made publicly. The timeline is short: Burnham is expected inside 10 Downing Street within weeks, and the first budget will arrive not long after, carrying this obligation among others.
What is now clear is that the defence plan Burnham is inheriting was announced before it was finished. Its purpose – to declare Britain’s commitment to NATO readiness – was served on the day of Starmer’s announcement. Its funding remains incomplete. Burnham has pledged to complete it. He has not said how. Whether he is the right person to answer that question, or whether he is simply the person who has to, is a distinction his first months in office will begin to resolve.
