Final-phase strike preparations
Memorandum 1 · issued 27 Feb 2026, 15:52 UKA high-confidence assessment that actors were in the final phase of preparation for a potential limited initial strike against designated military and security targets in Iran.
Large-scale US and Israeli strikes on Iranian targets began the next day, 28 February 2026.
The assessment concerned the timing and character of preparations, not whether conflict would ever occur. Sources and full limitations are set out on the case page.
