UK nuclear defence investment to rise by over £20 billion as submarine and warhead work expands

Britain plans to invest more than £20 billion extra in its Defence Nuclear Enterprise during financial years 2026–27 to 2029–30 compared with the preceding four-year period. The programme covers Dreadnought submarine construction, development of the replacement Astraea warhead and expansion of facilities supporting nuclear-submarine production and maintenance. Commitments include £8.4 billion for Dreadnought Delivery Phase 4, incorporating a £5.9 billion BAE Systems contract announced in July 2026, alongside broader infrastructure and warhead investments. The Ministry of Defence expects the enterprise's workforce to grow from more than 47,000 to around 65,000 by 2030 as manufacturing and specialist engineering demand increase.