Burnham revives Brexit debate, signaling potential referendum in next Labour manifesto

For the first time since Britain formally departed the European Union in January 2020, a sitting prime minister is willing to openly argue that the decision was a mistake. Andy Burnham, who took office after Labour's election victory, has begun making the case that Brexit has inflicted more damage than benefit on the country, and he is signaling that his party's next election manifesto could include a promise to hold another referendum on EU membership.

The shift marks a striking departure from the political consensus that had settled over Westminster in recent years. The Brexit question had consumed British politics for nearly a decade—from the Conservative manifesto promise of a referendum in 2015, through David Cameron's renegotiation with Brussels, the June 2016 vote itself, and then the grinding years of negotiation that followed under Theresa May and Boris Johnson. By the time the UK formally left on January 31, 2020, exhaustion had set in across the political spectrum. Both major parties had largely fallen silent on the subject, sensing that the public wanted to move on to other concerns. That silence has now broken.

Burnham first made his argument at the Labour Party Conference last month, declaring it time to "face up to the reality that Brexit has done more harm than good" and insisting that "the status quo is not good enough for Britain." He has since repeated the message in Parliament, laying out a two-part strategy. In the short term, he intends to negotiate what he calls a "deepening" of the UK's relationship with the European Union at a summit in Brussels scheduled for November 20. He has been careful to frame this as consistent with Labour's election pledges—the party promised voters it would reject membership in the customs union, the single market, and freedom of movement. The immediate focus, according to Downing Street, will be on securing agreements around youth mobility, food and drink standards, and energy cooperation.

The longer-term element of his strategy is more consequential. When speaking to the BBC, Burnham indicated that Labour's manifesto for the next general election could include a commitment to hold a referendum on whether Britain should rejoin the EU. In Parliament, he sought to preempt criticism by framing the question as one of national clarity. "This country in the next decade needs to know where it's going," he said. "There are no assumptions here, and as I said, the British public will be the boss of whatever is decided." The language was designed to suggest that reopening the question was not about overturning the previous result but about allowing voters to reassess their position with a decade of hindsight.

Opposition to the strategy has been swift. Lord Frost, who served as the government's chief Brexit negotiator, argued in the Telegraph that voters had already weighed the arguments and made their decision a decade ago. "The least they are owed is politicians willing to defend it," he wrote. Conservative leader Kemi Badenoch accused Burnham of attempting to "regurgitate yesterday's arguments with little prospect of success." The political calculation, however, appears to be that Burnham can appeal to voters who have grown skeptical of Brexit's results. Opinion polling suggests a majority now perceive that leaving the EU has not delivered the benefits that were promised.

The prime minister has also introduced a more contentious element into the debate. On a podcast, he claimed to have asked officials whether Russia interfered in the 2016 referendum and said he received "a clear answer that, yes, there was." He did not specify who provided that answer or what evidence supported it. In Parliament, his language was more cautious, saying it would be "inconceivable" to think Russia had not attempted interference—a formulation that leaves open the question of whether any interference was successful. Former Prime Minister Boris Johnson countered that when he had posed the same question as Foreign Secretary, he was told "there was no evidence of any successful interference in the 2016 referendum, by Russia or any other power." Reform UK leader Nigel Farage called Burnham "a liar" over the claim. The dispute highlights the difference between attempted interference, actual interference, and interference that changed the outcome—a distinction that remains contested.

The political logic behind Burnham's strategy appears to be to consolidate support among voters who have drifted away from Labour toward the Liberal Democrats, the Green parties, the Scottish National Party, and Plaid Cymru—all of which have maintained more openly pro-European positions. By reviving the question of Britain's relationship with the EU, he hopes to offer those voters a reason to return to Labour. Whether that calculation proves correct will depend on how the public responds to the reopening of a debate that, for six years, most politicians had been eager to close. What is certain is that the long silence on Brexit has ended.