As the tenth anniversary of the Brexit referendum approaches, debate has shifted from slogans to evidence. In this interview, Professor Mark Corner offers a measured but clear conclusion: “the UK has lost more than it has gained.” Drawing on political economy, constitutional analysis, and historical perspective, he revisits Brexit not as a singular rupture but as a dual crisis affecting both the European Union and the internal cohesion of the United Kingdom. Professor Corner highlights the paradox at the heart of Brexit—“taking back control” did not strengthen parliamentary sovereignty, but instead elevated popular sovereignty. At the same time, expectations of global economic freedom have given way to the enduring realities of geography and interdependence. His reflections situate Brexit as a revealing case of the gap between political promise and institutional consequence.
Interview by Selcuk Gultasli
As the tenth anniversary of the Brexit referendum approaches, public debate has moved decisively beyond the binary language of Leave and Remain toward a more empirically grounded reckoning with Brexit’s long-term political and economic consequences. In this context, Professor Mark Corner, Emeritus Professor at the University of Leuven, offers a particularly valuable perspective. His work situates Brexit not simply as a rupture in Britain’s relationship with the European Union, but as a dual constitutional and political crisis—one affecting both the European project and the internal cohesion of the United Kingdom. Bringing together political economy, constitutional analysis, historical memory, and populist mobilization, his reflections illuminate how Brexit has reshaped not only policy but also political imagination.
In his interview with the European Center for Populism Studies (ECPS), Professor Corner advances a sober conclusion captured in the headline of this conversation: “With Brexit, the UK has lost more than it has gained.” That judgment is not presented as a dramatic slogan, but as the outcome of a broader reassessment now taking place in British public life. As he puts it, “most economists would agree that the UK has lost more than it has gained,” and if that were not so, “the present government would [not] be trying so hard to move back toward a closer economic relationship with the EU.” In this sense, Brexit appears less as a fulfilled promise of renewed sovereignty than as a strategic rupture whose costs have become increasingly difficult to deny.
Yet Professor Corner’s account is more layered than a narrow economic audit. He draws attention to one of the central ironies of Brexit politics: that a project framed around “taking back control” did not, in fact, restore parliamentary sovereignty. On the contrary, he argues, the referendum “assert[ed] popular sovereignty over parliamentary sovereignty,”since most MPs would have preferred to remain. Similarly, the promise that Britain could flourish once “freed from the shackles of the EU” has, in his view, been undermined by the enduring reality of geography, interdependence, and trade. The fantasy of becoming “Singapore-on-Thames” has largely faded, replaced by the quieter recognition that “a very large share of our trade is conducted with Europe.”
The interview also places Brexit within a broader political and historical frame. Professor Corner shows how populist and radical-right actors have successfully shifted the argument away from economic performance toward sovereignty, border control, and cultural identity. In doing so, they have helped transform British political conflict from an older class-based divide into a more complex terrain shaped by “social and cultural division alongside economic division.” At the same time, he warns that Brexit’s most profound destabilizing effects may ultimately be domestic rather than European. While the feared cascade of exits from the EU never materialized, the United Kingdom itself remains vulnerable to centrifugal pressures, particularly in Scotland and Northern Ireland. In his words, “in the long run, [these] may prove more troubling than the difficulties in the EU.”
In sum, Professor Corner’s reflections offer a penetrating and historically informed account of Brexit’s legacy. Far from vindicating the claims of its proponents, Brexit emerges here as a case study in the gap between populist promise and institutional consequence—one that continues to shape the future of Britain, Europe, and the politics of sovereignty itself.
