Keir Starmer's resignation as UK prime minister, announced amid plunging poll numbers and internal Labour Party discontent, sets the stage for the country's seventh head of government since 2016. The rapid succession of leaders—from David Cameron through Liz Truss's 49-day tenure to Starmer—has sparked online claims that Britain is Europe's most unstable democracy. But the data tells a more nuanced story.
According to a European Pulse analysis of European Council members who held executive power between 2016 and 2026, Bulgaria leads the continent with ten distinct prime ministers over the period. The UK and Austria tie for second place with seven each, once Andy Burnham—the former Greater Manchester mayor and current Labour frontrunner—assumes office. Italy, long caricatured as the continent's revolving-door government, now sits in joint third with Latvia and Slovakia at five leaders apiece.
Why Bulgaria's Instability Outpaces the UK
Bulgaria's political fragility stems from years of fractured coalitions and repeated no-confidence votes. Since 2016, Sofia has cycled through governments led by Boyko Borisov, Stefan Yanev, Kiril Petkov, and others, often collapsing over corruption allegations or austerity disputes. The pattern mirrors the broader Balkan trend of weak institutional trust and polarised parliaments. By contrast, the UK's turnover, while dramatic, is concentrated in a shorter period of acute crisis following the 2016 Brexit referendum.
Italy's relative stability is a recent phenomenon. Under Prime Minister Giorgia Meloni, the country has broken its post-war record of roughly one government per year. Meloni's Brothers of Italy party has maintained cohesion, partly due to a fragmented opposition. Still, Italy's five leaders since 2016—including Paolo Gentiloni, Giuseppe Conte, and Mario Draghi—represent a marked improvement from the chaos of the early 2010s.
At the other end of the spectrum, several EU member states have seen only two leaders in the same decade. France has had two presidents (François Hollande and Emmanuel Macron), Portugal two prime ministers (António Costa and Luís Montenegro), and Spain two prime ministers (Mariano Rajoy and Pedro Sánchez). These countries benefit from fixed-term presidencies or stable parliamentary majorities.
Comparing Apples and Oranges: The Challenge of Measuring Leader Turnover
Direct comparisons across Europe are complicated by different systems of government. The UK operates a parliamentary system where the prime minister is accountable to the House of Commons and can be removed by a vote of no confidence. In contrast, Cyprus uses a presidential system where the head of state serves a fixed term and cannot be ousted by parliament alone. France and Romania employ semi-presidential models, with a directly elected president sharing power with a prime minister who answers to the legislature.
To ensure fairness, European Pulse matched UK prime ministers against the individual European Council members—whether presidents, prime ministers, or chancellors—who held executive power in each EU nation over the past decade. Leaders who left office and later returned were counted only once. Short-term acting chancellors in Austria, who temporarily exercised power between governments without being formally sworn in, were excluded.
The result: Bulgaria's ten leaders include figures like Kiril Petkov, whose reformist government collapsed after just seven months, and Nikolay Denkov, who lasted barely a year. The UK's seven include the ill-fated Liz Truss, whose 49-day premiership remains the shortest in British history, and Boris Johnson, whose tenure ended amid the Partygate scandal. Austria's seven include Sebastian Kurz, who served twice before resigning amid corruption investigations, and Alexander Schallenberg, who held the chancellery for just two months.
Online claims that the UK is uniquely ungovernable are overstated. The country's turnover rate, while high, is not an outlier when compared to Bulgaria or Austria. However, the speed of the churn—seven leaders in ten years, with none completing a full five-year term—reflects a deeper political dysfunction rooted in Brexit's polarising legacy, economic stagnation, and a first-past-the-post electoral system that once guaranteed stability but now amplifies volatility.
As Burnham prepares to take the helm, the UK faces a familiar challenge: restoring public trust in a system that has produced six prime ministers since 2016, each failing to deliver the promised stability. The broader European picture suggests that while the UK's turnover is not the continent's worst, it is a symptom of a wider crisis of governance that afflicts many member states—from Sofia's revolving-door coalitions to Vienna's corruption scandals.
For now, the title of Europe's most unstable government belongs to Bulgaria. But the UK's rapid succession of leaders, combined with its diminished international standing post-Brexit, has made it a cautionary tale for the continent. As one Brussels-based analyst put it: "The UK has gone from being the stable anchor of European politics to a case study in how quickly institutional resilience can erode."
