A New Era of Uncertainty: Britain's Shifting Threat Landscape
For decades following the Second World War, the British security establishment has consistently identified Russia as the nation's principal adversary. This long-standing perspective has been reinforced by recent events, including Russia's invasion of Ukraine, prompting renewed warnings about threats emanating from the east across various domains—from undersea cables to digital space. However, a profound reassessment may be necessary as the presidency of Donald Trump introduces unprecedented volatility into the transatlantic relationship.
The Erosion of the Special Relationship
The Anglo-American "special relationship," a cornerstone of British foreign policy for over eighty years, faces its most severe test in generations. Trump's increasingly erratic, aggressive, and often overtly hostile administration has shattered old certainties. The recent Greenland crisis stands as merely the latest and starkest manifestation of a deep-seated antipathy within this US administration towards the relatively liberal democracies of Europe, Britain included.
This presidency has ignited fundamental disputes on a wide array of issues critical to both nations: tariffs and trade, climate crisis responses, military spending commitments, the principles of international law, the regulation of powerful tech corporations, and the troubling rise of hard-right populism. Furthermore, concerns have mounted over potential US interference in foreign elections and the governance of diverse European cities, including London.
Institutional Reluctance to Face a New Reality
While public perception appears to be shifting—a recent Opinium poll found 32% of Britons now regard the US as a threat, a significant increase from pre-Trump levels—the British state apparatus seems reluctant to acknowledge this paradigm shift. The infrastructure of the special relationship is deeply embedded within the UK, from the GCHQ surveillance centre in Cheltenham collaborating with US intelligence to the nuclear-armed submarines at Faslane in Scotland equipped with US-maintained missiles. Thirteen US air force bases dot the British landscape, and the American ambassador's residence, Winfield House, boasts London's second-largest private garden.
This institutional investment makes accepting a rupture profoundly difficult. The government's strategic defence review, published in June 2025, exemplifies this reluctance. Its seven chapters meticulously considered threats from Russia, China, Iran, and North Korea, yet largely glossed over the implications of Trump's explicitly anti-European foreign policy, offering only a passing reference to a "shift in US security priorities."
A Warning from the Experts
The gravity of the situation is being sounded by respected voices in foreign policy circles. Bronwen Maddox, director of the influential thinktank Chatham House, recently stated that Western nations "must now contemplate what was unthinkable: to defend themselves against the US, in both trade and security." She went further, suggesting this moment could signify "the end of the western alliance" as it has been understood since 1945.
This sentiment echoes concerns raised by senior military figures. Last month, the head of the UK's armed forces, Richard Knighton, warned in a widely publicised lecture that the national security situation is "more dangerous than I have known during my career," advocating for a "whole of nation response" reminiscent of times of conflict. To an increasing cadre of senior military, intelligence, and political figures, Britain is already engaged in an undeclared war, albeit one where the adversary is not clearly defined.
Historical Precedent and Future Permanence
The last time the special relationship faced such widespread public questioning was during Ronald Reagan's presidency over forty years ago. Reagan's initially confrontational cold war stance, including the controversial 1983 invasion of Grenada, sparked outrage and made many Britons view him as a dangerous leader. This period saw US bases in Britain become contentious, fuelling the peace movement and inspiring critical cultural works.
However, that crisis abated as Reagan's policy softened, the Cold War ended, and the relationship returned to its unchallenged status. The current situation may prove less transient. The anti-European worldview is no longer confined to Trump alone; it has permeated deeper into the American political fabric. Figures like Vice-President JD Vance, a likely future presidential candidate, openly express contempt for Europe's "unstable minority governments" and advocate for even greater US "dominance" of the West.
This represents a belief system that has now burst decisively to the surface of US politics. Even if electoral fortunes turn against the Republicans, this nationalist ideology may not recede for a generation, presenting a long-term strategic challenge for Britain.
The Path Forward: Adjustment or Fundamental Rethink?
The British establishment currently appears wedded to an orthodoxy that there is little to gain and much to lose from a fundamental break with the US. This stance is underpinned by a deep-seated diplomatic impulse, honed since the loss of empire, to make the best of difficult situations and play for time—a strategy banking on the fact that "Trump won't be president forever."
Yet, as the world grows more volatile, this wait-and-see approach carries significant risk. The state can continue to believe the relationship is essentially unchanged, can be merely adjusted, or can be sustained in a diminished form. Alternatively, it can embark on some genuinely new strategic thinking. The greatest threat facing Britain may no longer lie across the plains of Eastern Europe, but across the Atlantic, and recognising this uncomfortable truth is the first, essential step toward navigating an uncertain future.
