Conservative leader Kemi Badenoch has accused outgoing Prime Minister Sir Keir Starmer of leaving a significant "mess" in defense spending for his expected successor, Andy Burnham.

Badenoch's criticism comes after the government unveiled its long-awaited defense investment plan, which proposes a £15 billion boost to the UK's defenses by 2030. However, the plan faces scrutiny over its funding, with Defence Minister Luke Pollard indicating that the next chancellor will need to find an additional £4.7 billion in the upcoming autumn Budget.

During Prime Minister's Questions on Wednesday, Badenoch pressed Starmer on the issue, asking if Andy Burnham, widely anticipated to become Prime Minister on July 20, had agreed to cover the projected shortfall. Badenoch claimed the government was prioritizing welfare spending and that Starmer's plan "has completely unravelled because he hasn't found the money to pay for it: it's £5bn short."

Sir Keir Starmer, in response, accused the Conservatives of "faux outrage" and highlighted that the Tories had reduced defense spending during their time in government. He stated that the current Labour government was proud of its plan and had committed to the increase thanks to "spare cash" built into the Budget by Chancellor Rachel Reeves.

The defense plan, announced ahead of next week's NATO summit, aims to ensure UK forces are prepared for future conflicts. However, it falls short of the £28 billion reportedly demanded by defense chiefs. The Treasury has identified £10.3 billion in savings, leaving the remaining £4.7 billion to be addressed in the next fiscal event. This funding gap has led to resignations from former defense ministers John Healey and Al Carns.

Badenoch further pointed out that in the past two years, the UK had only increased defense spending by 0.01% compared to its allies, suggesting Starmer's plan "didn't add up."

Downing Street has declined to comment on whether Burnham's designated chancellor would be required to use Budget "headroom" to cover the deficit or if Burnham had already approved the defense spending plan. Andy Burnham is expected to take over as Prime Minister, with Ed Miliband reportedly being considered for the role of Chancellor should Burnham secure the top office.

The situation presents a significant financial challenge for the incoming administration, with questions remaining about how the projected £4.7 billion shortfall in defense funding will be met.