The Briefing Room What's the current state of the UK's armed forces?
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Mar 19, 2026 
Ruth Harris, RAND Europe exec focusing on national security and data science. Shashank Joshi, Defence Editor at The Economist. Dr Jack Watling, RUSI expert on modern warfare. General Sir Richard Barrons, Chatham House strategist and co-author of the Strategic Defence Review. They dissect UK force shrinkage, platform and munitions shortfalls, the rise of digital kill webs and autonomy, personnel and industrial constraints, and prospects for European cooperation.
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Post Cold War Force Shrinkage
- The UK armed forces have shrunk dramatically since 1990, leaving a capability gap for high-intensity state conflict.
- Army halved to ~70,000 regulars, RAF down from 850 to ~160 combat jets, Royal Navy from 50 to 13 major ships, limiting independent operations.
War Is Now A Digital Kill Web
- Modern warfare centers on a digital 'kill web' linking global sensors, AI processing and remote effectors.
- Barrons explains sensing-to-shoot times can be seconds or minutes and autonomous drones and missiles extend reach dramatically.
Buy People And Industry Not Just Drones
- Invest in uncrewed and autonomous systems while rebuilding the support 'tail' of people and industry behind them.
- Ruth Harris and Jack Watling stress maintenance, intelligence processing and industrial supply chains remain essential even for cheaper autonomous platforms.