D
Nuclear ForcesUnited Kingdom

UK nuclear forces

National nuclear arsenalActivePending verification
Nuclear ForcesGBR
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Fact cardConfidence · Source
System
TypeNational nuclear arsenal
ProliferationOrigin country only
Warhead inventory
Total inventory225 warheadsMilitary stockpile plus retired warheads awaiting dismantlementMed[1]
Military stockpile225 warheadsMed[1]
Deployed strategic120 warheadsMed[1]
Reserve / nondeployed105 warheadsMed[1]
Notes
Warheads per submarine were lowered from 48 to 40, giving 120 operationally available warheads. The 2021 stockpile ceiling is no more than 260 warheads.
Summary

Estimated warhead inventory of 225 as of early 2026, per the Federation of American Scientists.

Draft entry. Values come from the cited public sources and are awaiting editor verification.
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Operators
United Kingdom
Sources
  1. Status of World Nuclear Forces 2026, Federation of American Scientists
    Published/updated 2026-06-09 · Tier 2 · checked 2026-10-05
Change log
  • 2026-10-05 Entry created from the FAS Status of World Nuclear Forces 2026