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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

3 min read

· Last updated: May 27, 2026

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UK, Poland to sign defence treaty to tackle Russian threats

Britain and Poland Strengthen Defence and Security Cooperation

LONDON, May 27 (Reuters) - Britain will sign a new defence and security treaty with Poland on Wednesday to combat threats, including from an increasingly aggressive Russia, part of Prime Minister Keir Starmer's efforts to bolster ties with the rest of Europe.

The deal, due to be signed by Polish Prime Minister Donald Tusk and Starmer in London, will improve border security, tackle organised crime and deepen defence cooperation with the European Union, a statement from the British government said.

Context and Background

The latest defence deal with an EU member, following similar agreements with France and Germany, underlines Starmer's push to repair the damage inflicted by Brexit almost 10 years ago and to respond to calls by U.S. President Donald Trump for Europe to take more responsibility over the continent's defences.

Before leaving Poland, Tusk said both nations saw "Russia as a strategic threat" and the two leaders are expected to discuss an increase in hybrid attacks, cyberattacks and espionage.

Statements from Leaders

'STRONGER PARTNERSHIP' NEEDED, SAYS STARMER

"The challenges Europe now faces demands an even stronger partnership," Starmer said in a statement.

"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."

Key Areas of Cooperation

Britain said the deal would allow the two nations to combine expertise and industrial capability to lead the development and manufacturing of complex next-generation weapons, including strengthening air and missile defence systems.

Tusk said beyond defence, a significant part of the treaty would focus 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. 

Broader European Defence Initiatives

The deal with Poland is the latest bilateral defence agreement Britain has pursued under Starmer, who has found more success on the foreign stage than at home, where rivals are circling and could trigger a leadership contest.

After Trump's administration demanded Europe did more to protect itself, putting a question mark over the NATO military alliance, both Britain and Poland have sought to seal defence deals with other nations.

Recent Defence Agreements

Last year, Britain and France agreed to build on their defence relationship, including to reinforce cooperation over their nuclear arsenals, and Starmer also signed a treaty to deepen ties with Germany.

Poland signed a defence treaty with France in 2025, boosting defence cooperation, and is working on a similar treaty with Germany.

Reporting Credits

(Reporting by Muvija M in London and Alan Charlish in Warsaw, writing by Elizabeth Piper and Muvija MEditing by Tomasz Janowski and Sharon Singleton)

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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