Bank of England flags financial disruption from advanced AI – report

The Bank of England’s Prudential Regulation Authority warned that advanced AI models (e.g., Anthropic’s Mythos, ChatGPT 5.5 Instant) could cause “quite significant disruption” to financial services, raising operational and cybersecurity risks for banks. Sam Woods said AI-driven identification of weak points and slow patching is a key driver of outages, increasing pressure on firms to improve cyber hygiene and deploy AI-based defenses. Regulators in the UK and US have held recent talks with large banks and are coordinating with the National Cyber Security Centre, the FCA and HM Treasury; the UK is also considering a shared testing framework for general-purpose AI used by lenders. For UK 100 constituents (large UK banks and financials) this implies elevated operational risk, potential short-term volatility, and a regulatory push toward stricter testing and faster remediation.