Cameron welcomed the agreement, pointing to Britain’s naval and cyber capabilities and Poland’s expanding military strength. The treaty was signed by Polish Prime Minister Donald Tusk and British Prime Minister Keir Starmer at RAF Northolt on Wednesday. It covers cyber cooperation, the joint development of a next-generation medium-range air defense missile, and expanded cooperation on uncrewed systems for NATO's eastern flank. Both governments described it as a generational step up in defense and security cooperation. The agreement comes as European allies face growing pressure from President Donald Trump's administration to take more responsibility for the continent's defense. Tusk said both countries view Russia as a strategic threat. Cameron said NATO “has actually never been stronger” but warned that Europe must demonstrate it is rearming, spending more, and working together. The remarks were delivered at the Polish Economic Congress — themed “Time of Advantage” — where Cameron appeared as a special guest.