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Explainer · on 2026 Labour Party leadership crisis · 12 June 2026

Labour defence secretary quits over military spending, deepening party crisis

Defence Secretary John Healey and Armed Forces Minister Al Carns resigned on 11 June over the government's military funding plans, which they said were insufficient for current threats. The departures mark the seventh and eighth ministerial resignations in a month, intensifying pressure on Prime Minister Sir Keir Starmer amid a broader Labour leadership crisis.

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4 min read · 968 words

What is happening

Defence Secretary John Healey resigned on 11 June in protest over the government's proposed Defence Investment Plan, according to the BBC 137. In his resignation letter, the BBC reports Healey criticised the plan as insufficient to meet the armed forces' minimum resource requirements 6. Hours later, Armed Forces Minister Al Carns also stepped down, stating the plan was "not built for the current threat and not sufficiently funded" 17.

The BBC reports the government is preparing to announce a £13.5bn funding increase for the Ministry of Defence over four years, less than the £28bn requested by the department 7. According to the BBC, the plan is backloaded, with pressure on operations and readiness in the first two years, and is being funded by cutting capital budgets across government departments by 1% 37. Sir Keir Starmer defended the plan as delivering "an unprecedented increase in spending in a sustainable and fair way", the BBC reports 3.

The resignations represent the seventh and eighth ministerial departures in the past month 1, part of what multiple outlets describe as a broader Labour Party leadership crisis 1456. The BBC reports health secretary Wes Streeting resigned on 14 May 2125, and according to The Guardian, a Labour MP stood down to allow Greater Manchester mayor Andy Burnham to contest a by-election in Makerfield 222324. The BBC reports Burnham confirmed his candidacy on 19 May 1013 and has said he would seek to enter any leadership contest 8. Channel 4 News reports former Welsh first minister Mark Drakeford called for Starmer to step down 11, whilst the BBC reports Drakeford endorsed Burnham for prime minister 12.

Why it matters

Healey's resignation is particularly damaging because, as the BBC notes, he was one of Starmer's most loyal cabinet allies 7. The Guardian describes his departure as occurring "at the worst possible time" for the prime minister 6, coming amid intense internal party debate over Starmer's leadership. The New York Times characterises the resignation as "a blow to Starmer" 5, whilst The Telegraph suggests it "torpedoes Starmer" and ends his hopes of remaining Labour leader 4.

The defence funding dispute has wider European implications. The Guardian reports the UK, France, and Italy are not increasing defence spending due to concerns about undermining lenders' confidence in their national debt 2. According to The Guardian, the UK has pledged to reach 3% of GDP for defence spending only by 2029, whilst France and Italy are expected to hit 2.5% by the decade's end 2. The BBC reports the government faces calls to increase defence spending to 3% of GDP by 2030, but is planning 3.5% only by 2035 3.

The Guardian reports Russia is conducting a covert war of sabotage, assassinations, cyber-attacks, and drone intrusions against Europe 2, lending urgency to the funding debate. The publication notes the prime minister warned of the risk of more wars in Europe by 2030 2. The Guardian also reports the UK chose to stay out of a planned Defence, Security and Resilience Bank, leaving Canada and Luxembourg to lead 2.

Who is involved

John Healey served as defence secretary until his resignation on 11 June. The BBC reports Dan Jarvis has been appointed as his replacement 1. Al Carns was Armed Forces Minister until stepping down the same day 17. Sir Keir Starmer is the Prime Minister and Labour Party leader facing pressure to resign. According to the BBC, Healey asked other defence ministers to remain in their posts despite his own departure 1.

Andy Burnham, currently Greater Manchester mayor, is positioning himself as a potential successor. The BBC reports he confirmed he would seek to enter any Labour leadership contest 8 and is now the Labour candidate in Makerfield following the standing-down of the sitting MP 10132223. According to The Guardian, Starmer will not attempt to block Burnham from standing 24.

Wes Streeting, who resigned as health secretary on 14 May according to the BBC 2125, has confirmed he will stand if a leadership race is triggered, The Guardian and The Independent report 1617. However, Labourlist reports polling suggests Streeting would lose a leadership contest against Starmer 26. Rachel Reeves, as Chancellor, is central to the funding decisions that prompted Healey's criticism, according to The Guardian 6.

What to watch next

The Defence Investment Plan is yet to be released 1 and was due to be announced before a NATO summit in Turkey, which the BBC reports was set as a public deadline 7. Whether the new defence secretary, Dan Jarvis, can secure additional funding or whether the government proceeds with the disputed plan will determine if further resignations follow.

The mechanics of a potential leadership challenge remain uncertain. Labourlist is tracking which Labour MPs are calling for Starmer to go and who is still backing him 19. The Guardian reported on 16 May that the week had left Britain's PM "looking like an interim leader" 15, suggesting momentum may be building against him. The BBC reports the government is facing calls to resign within its own party following poor election results 7, though specific electoral performance data appears in analysis by Persuasionuk 20.

Whether Burnham can successfully pivot from mayor to MP, and whether a sufficient number of MPs and party members would support his or Streeting's leadership bid, will shape the crisis's trajectory. The Economist argued on 14 May that "Sir Keir Starmer has failed abjectly. He should go" 27, indicating editorial pressure alongside internal party tensions. The Guardian described Westminster on 14 May as waiting "in frenzied limbo" 28, a characterisation that remains apt as the crisis deepens with each ministerial departure.

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Sources (28)
  1. BBCArmed Forces Minister Al Carns quits hours after Defence Secretary John Healey steps down over military spending plans - live updates
  2. The GuardianThe UK defence minister’s shock resignation is a warning for all of Europe
  3. BBCHealey quits as defence secretary in row over military spending
  4. The TelegraphHealey resignation torpedoes Starmer
  5. The New York TimesU.K. Defense Secretary Resigns, in a Blow to Starmer
  6. The GuardianPolite but deadly: John Healey skewers Keir Starmer as he heads for the door
  7. BBCArmed forces minister quits after Healey exit as defence funding row deepens
  8. BBCBurnham says he would seek to enter any Labour leadership contest
  9. The IndependentStarmer can survive a leadership challenge, cabinet minister warns PM’s critics
  10. BBCAndy Burnham confirmed as Labour candidate in Makerfield
  11. Channel 4 NewsFormer Welsh first minister: ‘Starmer should step down’
  12. BBCFormer first minister Drakeford says Andy Burnham should be PM
  13. BBCAndy Burnham confirmed as Labour candidate in Makerfield
  14. The GuardianTens of thousands march through London for far-right and pro-Palestine protests – as it happened
  15. The Guardian'Why are we even doing this?' The week that left Britain's PM looking like an interim leader
  16. The IndependentWes Streeting confirms he will run in any Labour leadership race
  17. The GuardianWes Streeting confirms he will stand if Labour leadership race is triggered
  18. BBCKettering MP resigns from Department of Health job
  19. LabourlistWhich Labour MPs are calling for Starmer to go - and who is still backing PM?
  20. PersuasionukMay 2026 elections analysis: England, Scotland and Wales
  21. BBCWes Streeting resigns as health secretary - his letter in full
  22. The GuardianLabour MP to stand down to allow Burnham run for byelection amid leadership row
  23. BBCAndy Burnham says he'll try to run for Parliament after MP says he'll stand down for him
  24. The GuardianStarmer will not attempt to block Burnham from standing to be MP in Makerfield - as it happened
  25. BBCWes Streeting resigns as health secretary - his letter in full
  26. LabourlistStreeting would lose leadership contest against Keir Starmer, poll reveals
  27. The EconomistSir Keir Starmer has failed abjectly. He should go
  28. The GuardianWestminster waits in frenzied limbo before Wes jumpstarts day of drama