Britain’s Submarine Delivery Agency says UK aims to double production for up to 12 SSN-AUKUS submarines

Britain aims to double submarine production to support a Royal Navy fleet of up to 12 SSN-AUKUS attack submarines, according to the Submarine Delivery Agency's 2025/2026 annual report. Expansion at BAE Systems' Barrow shipyard, Rolls-Royce's Raynesway site and suppliers must accommodate the simultaneous construction of four Dreadnought ballistic-missile submarines. A Submarine Production Alliance brings the government's delivery organization together with BAE Systems, Rolls-Royce Submarines and Babcock to coordinate design, manufacturing and supply-chain planning. The report identifies a 2026 preliminary design review for SSN-AUKUS but does not specify when the doubled production rate will be achieved.