The United Kingdom and Poland are set to sign a new defence treaty to deepen security cooperation amid rising Russian threats, aimed at safeguarding borders, countering organised crime, and strengthening collective defence while boosting collaboration with the European Union.

Prime Minister Keir Starmer and Polish Prime Minister Donald Tusk will meet in London to sign this agreement, described as the biggest step forward in their defence relationship in a generation.

The treaty follows broader European efforts to coordinate defence responses to hybrid threats and to reinforce allied commitments across Europe.

Leaders will advance the use of uncrewed systems to reinforce NATO’s Eastern Flank, with large-scale joint exercises anticipated.

Poland’s role as a hub for military aid to Ukraine and its exposure to Russian cyber operations underscore a focus on cybersecurity within the pact.

The agreement would enable closer integration of forces and capabilities, including co-production and deployment of air-defence technologies and next-generation medium-range missiles, as well as expanded use of uncrewed systems.

Poland is highlighted as a close defence and security partner, a supporter of Ukraine, and a key economic ally, with emphasis on strengthening NATO’s Eastern Flank and regional deterrence.

Poland borders Russia, Belarus, and Ukraine, and views defense pacts, alongside its US and EU partnerships, as crucial for security amid regional instability.

The talks are part of a broader UK strategy to deepen European ties, improve security, and boost opportunities for citizens while maintaining European stability.

The agreement sits within a trajectory of deepening continental defence cooperation, following earlier pacts and coordinated posture with partners like Norway, France, and Germany.

No specific treaty terms are disclosed, but the overall expectation is a substantial deepening of UK‑Poland military and strategic cooperation.

A core element is joint development of defence capabilities, including co-production of mid-range air-defence missiles and other advanced munitions, leveraging UK and Polish industrial and technical strengths, and enabling larger joint exercises.