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.
UK Prime Minister Sir Keir Starmer and Polish Prime Minister Donald Tusk formalized the pact at RAF Northolt air base in west London on Wednesday, May 25.
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.
Both countries will also work together to better detect and respond to cyberattacks and malign information campaigns, while a new Joint Action Plan on Irregular Migration will tighten border security, improve intelligence-sharing on smuggling networks, and increase monitoring of how social media is used to recruit and move migrants.
The move comes as Kyiv warns that Russia is not only stepping up mobilization efforts, but also attempting to fill manpower gaps by recruiting foreign fighters from low-income countries with promises of high salaries and fast-track citizenship.
According to Main Directorate of Intelligence of the Ministry of Defense of Ukraine, the Kremlin is already recruiting foreigners inside Russia by exploiting legal vulnerabilities – such as expired tourist or student visas – and has warned foreigners against traveling to Russia or seeking employment there.