Trident replacement: Costs rise and timetable slips


The SDSR and Trident: Analysis from NIS


  • Costs of submarine construction rise by around 20% to £31 billion.
  • In service date slips to “early 2030s'.
  • £10 billion contingency fund and new management arrangements to reduce project risks.
  • Trident debate in Parliament confirmed.
  • Decision on new warhead may be put back.


The costs of building four new submarines for the UK's Trident nuclear weapons programme has risen to at least £31 billion pounds, with the submarines not scheduled to enter into service until the early 2030s according to the government's Strategic Defence and Security Review (SDSR).  Read the full analysis.


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