The UK and Poland have agreed a new defence plan aimed at strengthening security and deterrence on Europe's Eastern Flank, the Ministry of Defence said in a press release published on 27 October 2026. Defence Secretary Wes Streeting set out the Warsaw Defence Plan after meeting his Polish counterpart, Władysław Kosiniak-Kamysz, in Warsaw. It forms the first phase of cooperation under the new UK-Poland Security and Defence Partnership Treaty.

Under the plan, the two countries will work together across sea, land, air, cyber and industry. Areas named include joint work on the manufacture and development of next-generation air defence missiles, co-development of drone and counter-drone technologies, cyber security cooperation, and shared experience from their frigate programmes, the British Type 31 and Polish Miecznik. The plan also covers increased defensive maritime activity in the Baltic Sea, including exercises and regional coordination.

On industry, the UK and Poland will coordinate defence procurement more closely, building on Poland's purchase of the Narew air defence system from MBDA UK. BAE Systems and Poland's PGZ are to expand large-calibre ammunition production capacity. The statement also said the two nations plan a major Coalition of the Willing exercise in Poland the following month, involving thousands of personnel to prepare the Multinational Force Ukraine for training and post-war rebuilding support.