The UK government's long-awaited deence investment plan has been delayed again, with government sources now playing down the prospect of an announcement next week when Parliament returns from recess. The plan is meant to fill an estimated £28 billion funding gap over the next four years, but the Treasury has been trying to limit how much extra cash it must provide, according to the source report. The delay has raised alarm among NATO officials, who worry the package will not be ready in time for a summit in July where US President Donald Trump is expected to increase pressure on allies.

The £28 billion gap that stalled Starmer's defence document

Prime Minister Keir Starmer has been wrangling with ministers for months over how to close the estimated £28 billion shortfall in the UK's defence budget over the next four years. The investment plan — originally slated for autumn last year — still has not been released. Treasury officials, led by Chancellor Rachel Reeves, have been pushing to limit the additional spending despite what the source describes as “growing alarm at the threats facing the country.” Pensions minister Torsten Bell told Sky News the document will be published “when it's ready,” and insisted the delay is about “getting the details right” rather than internal disagreement.

Why NATO officials are watching the July summit date

The delay comes at a sensitive moment for the alliance. NATO officials have expressed concern that the UK's investment plan will not be ready before July, when allies are expected to show defence commitments at a key summit — a gathering where US President Donald Trump is likely to push for higher burden-sharing. As the report notes, Trump has already criticised partners for refusing to back his “war against Iran.” The UK has pledged to increase defence spending to 2.7% of GDP from next year and 3.5% by 2035, but the lack of a detailed spending roadmap undermines that promise in the eyes of allies.

A former Labour defence secretary's 'corrosive complacency' warning

Lord George Robertson, a former Labour defence secretary and co-author of the Strategic Defence Review, used a lecture last month to castigate the government. According to the source, he accused the Prime Minister of a “corrosive complacency” on defence and said Starmer is unwilling to “make the necessary investment.” The Strategic Defence Review, published a year ago, pledged to end the “hollowing out” of the UK's armed forces, but the corresponding investment plan has never materialised. Shadow defence minister David Reed called the delay a sign that “Labour has no plan to keep this country safe.”

The Tory amendment that would force Healey's hand by June 2

The opposition Conservative Party plans to force a vote on an amendment to the Armed Forces Bill on June 2 — exactly one year after Labour published its Strategic Defence Review.. The amendment would require Defence Secretary John Healey to lay the defence investment plan before both houses of Parliament within one month of the bill receiving Royal Assent. The manoeuvre is intended to end the prolonged uncertainty, but it is not clear whether the government has enough votes to block it. open questions remain: Will the plan, when it does appear, actually close the £28 billion gap? And will it include the detaild, multi-year commitments that NATO allies want to see?