The UK and Poland have signed the Northolt Treaty – a new defense and migration pact designed to tighten military cooperation and boost border security, as both countries warn that Russia remains the most significant threat to Euro-Atlantic security. British Prime Minister Keir Starmer and Polish Prime Minister Donald Tusk formalized the pact at RAF Northolt air base in west London on Wednesday, May 25.JOIN US ON TELEGRAMFollow our coverage of the war on the @Kyivpost_official. Tusk said the countries’ “shared values,” including the rule of law and human rights, provide the “foundation of the treaty.” Starmer called the deal a “generational uplift” in the bilateral relationship, saying it would help prepare both the UK and Poland – as well as “Europe as a whole” – for the challenges posed by Russia, which the treaty describes as “the most significant long-term threat” to Euro-Atlantic security. How it works Starmer said, “Britain and Poland are already close allies and friends, but the challenges Europe now faces demand an even stronger partnership,” describing the treaty as the “biggest step forward” while pointing to “modern security threats that may be less visible but no less dangerous.” The two countries plan to jointly develop a next-generation medium-range air defense missile, expand large-scale military exercises, and improve interoperability in counter-drone warfare, electronic warfare, and engineering support.