UK, Poland set to sign defence treaty to tackle hostile threats across Europe - Finance news and analysis from Global Banking & Finance Review
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UK, Poland set to sign defence treaty to tackle hostile threats across Europe

Published by Global Banking & Finance Review

Posted on May 26, 2026

2 min read

· Last updated: May 26, 2026

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UK, Poland to Sign Defence Treaty Strengthening European Security Partnership

New Defence and Security Treaty to Bolster European Cooperation

LONDON, May 26 (Reuters) - Britain will sign a new defence and security treaty with Poland on Wednesday to strengthen defence cooperation in the face of increasing hostile threats across Europe, the government said, following similar deals with France and Germany.

The deal, due to be signed when Polish Prime Minister Donald Tusk meets his British counterpart Keir Starmer in London, will improve border security, tackle organised crime and deepen defence cooperation with the European Union, the statement said.

Addressing Hybrid Threats and Security Challenges

They will discuss what Britain called a major uptick in hybrid attacks, including Russian-ordered arson attacks in East London and across Europe, as well as cyberattacks and espionage, the government said. 

While Britain and Poland are already close allies, Starmer said "the challenges Europe now faces demands an even stronger partnership". The continent has been under pressure from U.S. President Donald Trump's administration to take greater responsibility for its own defence.

Strengthening the UK-Poland Relationship

"This treaty is the biggest step forward in our defence and security relationship with Poland in a generation, allowing us to confront modern security threats that may be less visible but no less dangerous," Starmer said.

'Historic' Treaty and European Alliances

In a Polish government meeting on Tuesday, Tusk said that the signing of the treaty would be a "historic moment".  

Poland's Growing Defence Partnerships

Poland signed a defence treaty with France in 2025, boosting defence cooperation, and is working on a similar treaty with Germany, as alliances with European partners take on greater significance for Warsaw.

Focus on Cybersecurity and Counter-Espionage

Tusk said beyond defence a significant part of the treaty focused on cybersecurity. Poland says its role as a hub for military aid to Ukraine has made it a key target for Russian espionage, cyberattacks and disinformation. 

Joint Development of Defence Capabilities

On the defence part of the deal, the British government said it would seek to combine expertise and industrial capability to lead the development of complex weapons, including new sophisticated munitions and the co-production of a medium‑range air defence missile.  

(Reporting by Muvija M in London and Alan Charlish in WarsawEditing by Tomasz Janowski)

Key Takeaways

  • The treaty, set for signing on May 27, 2026 when PM Donald Tusk meets PM Keir Starmer, will enhance border security, organised crime response, defence industry collaboration and joint development of mid‑range air defence missiles. (polskieradio.pl)
  • This follows Poland’s 2025 treaty with France—in Nancy on 9 May—that established mutual defence commitments, industrial and cybersecurity collaboration, and regular strategic dialogues. (pap.pl)
  • The move reflects mounting pressure from hybrid threats—arson, sabotage, cyberattacks and espionage—largely attributed to Russian intelligence across Europe, including the UK and Poland. (rusi.org)

References

Frequently Asked Questions

What is the main purpose of the new UK-Poland defence treaty?
The treaty aims to strengthen defence cooperation, improve border security, tackle organised crime, and address cybersecurity threats across Europe.
When will the UK and Poland sign the defence treaty?
The UK and Poland will sign the new defence and security treaty on Wednesday during a meeting in London.
What threats are prompting the UK and Poland to enhance defence cooperation?
Increasing hostile threats such as Russian-ordered arson, hybrid attacks, cyberattacks, and espionage have led to the enhanced cooperation.
What other countries has Poland signed recent defence treaties with?
Poland has signed defence treaties with France and is working on a similar treaty with Germany.
How does the treaty impact cybersecurity?
A significant part of the treaty focuses on deepening cooperation in cybersecurity to protect against disinformation and cyber threats.

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