On the tenth anniversary of the United Kingdom’s 2016 referendum to leave the European Union, reflections on former Prime Minister David Cameron’s role in the process have resurfaced, highlighting widespread debate over his political legacy.

David Cameron, who served as Conservative Party leader from 2005 and as prime minister from 2010 to 2016, initiated the referendum on Britain's membership in the EU—a move that ultimately led to the decision to leave. His decision to hold the vote was driven in part by his promise to Conservative Eurosceptics and pressure from rising political forces such as the UK Independence Party (UKIP). However, many analysts argue that Cameron’s approach to the referendum contributed to its disruptive aftermath.

Critics contend that Cameron underestimated the political and economic challenges posed by Brexit, leading to a series of miscalculations. They point to his premature assurance to Eurosceptic factions, including a commitment to hold a referendum on the EU’s Lisbon Treaty in 2007, which was later abandoned. This failure fueled the rise of Eurosceptic sentiment within the Conservative Party and beyond, culminating in Cameron’s 2016 pledge to give the public a vote on EU membership—a commitment some viewed as a political gamble.

The referendum itself is widely interpreted as a turning point marked by unforeseen consequences. Evidence suggests that the UK government was unprepared for a Leave outcome. According to one study, about half of Brexit’s long-term economic damage occurred in the immediate post-referendum period, when political instability and uncertainty gripped the nation. Critics accuse Cameron of ordering civil service officials not to prepare for a Leave vote, a decision described by some as negligent.

Following the vote to leave the EU, Cameron resigned as prime minister, a move that was seen by some observers as a failure to provide steady leadership during a critical moment. His departure led to political uncertainty as the country faced complex negotiations with the EU and internal divisions.

Since leaving office, Cameron has largely stepped back from frontline politics but remains active in the private sector. He has delivered paid speeches on topics including leadership during disruption and political fragmentation, notably addressing conferences such as the “Energy Disruptors: Unite” event in Calgary, Alberta—a region itself contemplating a referendum on sovereignty. Some see this as an attempt by Cameron to share insights gained from managing historic political challenges, while others view it as incongruous given the outcomes of his tenure.

Cameron’s post-premiership activities also include advisory roles and lobbying, including a controversial stint associated with financier Lex Greensill. His status as a part-time public figure and commentator continues to evoke mixed reactions, with some questioning the lessons imparted by his experience.

Debate over Cameron’s political legacy remains charged. Supporters acknowledge his relatively stable six-year leadership, including cooperation with the Liberal Democrats and a period of relative calm compared to the heightened turnover of prime ministers that followed. However, many critics characterise his career as marked by overconfidence and strategic errors, with Brexit viewed as a defining failure that reshaped British politics and society for years to come.

As the UK marks a decade since the referendum, discourse on Cameron’s impact underscores the complexities of leadership amid deep political divides and the lasting consequences of decisions that continue to influence the country’s trajectory.