Former British Prime Minister Sir Keir Starmer called for the establishment of a common security framework in Europe, emphasizing that changes in the continent’s defense relationship with the United States are permanent rather than temporary shifts linked to specific administrations. Speaking at the British Irish Chamber of Commerce dinner in Dublin on Friday, Starmer argued that Europe must adapt to a new reality in which the U.S. will no longer serve as the primary financial backer of its European allies’ security.

Starmer said recent developments, including Russia’s invasion of Ukraine and the abrupt shift in U.S. policy under former President Donald Trump, revealed vulnerabilities in Europe’s defense preparedness. “Things will not go back to the way they were,” he stated, highlighting the need for Europe to assume greater responsibility for its own defense and security.

He advocated for Europe to develop a collective security arrangement on par with its efforts to establish a single market, with the UK positioned centrally within this new framework. While underscoring that the transatlantic military, security, and intelligence alliances remain critical and strong, Starmer insisted that Europe’s future security strategy must reflect its own enhanced capabilities and initiatives.

“This is not simply about increasing defense spending,” he said, emphasizing that structural changes to collaboration and responsibility-sharing across European nations are essential.

Starmer’s intervention marks his first major public address since leaving office, signaling a continued engagement with key international issues. His remarks come amid ongoing discussions across Europe regarding how to respond to shifting geopolitical dynamics and a perceived reduction in U.S. willingness to underwrite European security costs.