Trident Submarines: Procurement
The question
To ask the Secretary of State for Defence, with reference to his Department's news story entitled Major £8.4bn investment advances UK nuclear deterrent and backs British industry, published on 30 July 2026, if he will provide a detailed breakdown of the £8.4 billion allocated to Dreadnought Delivery Phase 4.
Answered by Ministry of Defence
Delivery Phase 4 (DP4) is the latest phase of the Dreadnought programme. It will enable the first-in-class submarine, Dreadnought, to complete her build, sea trials, and certification, ahead of entering service in the early 2030s. During this phase, the second boat will progress to sea trials, while the third and fourth boats will achieve key construction milestones.
Of the £8.4 billion allocated to DP4, £5.9 billion has been committed to BAE Systems through a contract signed in July 2026. Further contracts will also be placed with the wider submarine production supply chain during the DP4 period.
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