Prime minister promises to fight any leadership challenge as he faces escalating row over military spending

Keir Starmer has admitted that he has to “turn things around” after the resignation of the defence secretary, John Healey, in an escalating row over military spending that has prompted recriminations across Whitehall and concern from the US.

Downing Street and the Treasury traded blows with allies of Healey on Friday. No 10 expressed dismay that the Ministry of Defence (MoD) had wanted £18bn to plug funding gaps in major projects, while those close to the former defence secretary accused Starmer of failing to acknowledge the deterioration in global security.

John Healey’s complaint is that Starmer sat on this problem for months before making a derisory offer

John Healey’s resignation as defence secretary on Thursday was a long time brewing, though in the end the denouement was swift. It leaves an already weak Keir Starmer without a defence strategy less than a month before a Nato summit and an unresolved row about spending as Donald Trump threatens to restart the bombing of Iran.

On Monday, No 10 finally told Healey how much more money it was prepared to give the Ministry of Defence to fund major projects as part of the defence investment plan (Dip).

Former defence secretary accuses PM of putting UK’s security at risk at a time of growing international threats

Keir Starmer’s premiership has been pushed to the brink of collapse after the shock resignation of John Healey as defence secretary undermined his security credentials and risked shredding his remaining political authority.

In a blistering resignation letter, Healey accused Starmer and his chancellor, Rachel Reeves, of putting the country’s security at risk, saying the long-awaited defence investment plan (Dip) fell well short of what was required.