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From Awkward Ex to Security Partner: Germany and Britain 10 years after Brexit
23/06/2026

istock / masterSergeant
istock / masterSergeant

Ten years after the Brexit referendum, the awkward ‘divorce’ phase appears to be overcome. British-German relations have returned to normal, with the focus primarily on cooperation in security and defence policy.

Ten years ago, a narrow majority in the United Kingdom voted to leave the European Union – it marked a decisive break in European integration, which had previously moved in only one direction. This did not only cause lasting damage to British-European relations, but also to British-German relations.

Bilateral relations over the next ten years were initially very strained. Following the United Kingdom’s final withdrawal from the EU, a degree of normality began to take hold, culminating in the signing of the Treaty of Kensington in July 2025. Cooperation on security and defence policy was the main driving force behind this, whilst exchanges in other fields remain at a standstill.

In the latest issue of Berlin Perspectives, Nicolai von Ondarza traces the development of British-German relations over the ten years since the Brexit referendum. He also analyses the current state of these relations and highlights the balance Germany must strike between bilateral and European interests.

Team & authors

About the Berlin Perspectives project: The IEP Policy Brief series Berlin Perspectives presents precise analyses on Germany’s European policy to an English-speaking audience. The authors analyse German European policy positions on current topics and debates to provide policy recommendations based on their findings.

ISSN/ISBN:
Image copyright: istock / masterSergeant