Sir David Omand GCB is Visiting Professor in War Studies, King’s College London. His posts in British government service included UK Security and Intelligence Coordinator in the Cabinet Office, Permanent Secretary of the Home Office, and Director of GCHQ. He served for seven years on the JIC. He is a member of the senior advisory board of Paladin Capital, investing in cybersecurity companies. He has published four books: Securing the State (Hurst 2010); Principled Spying: the Ethics of Secret Intelligence (with Prof Mark Phythian) (Oxford 2018); How Spies Think: 10 Lessons from Intelligence  (Penguin 2021) and How to Survive a Crisis: Lessons in Resilience and Avoiding Disaster (Penguin June 2023).