Key Takeaways
- A study using internal Bank of England company data estimates that Brexit has reduced UK economic output by about 6 % over the past decade.
- Roughly half of this loss stems from the initial shock and uncertainty after the 2016 referendum; the remainder is attributed to new trade barriers created when the UK left the EU customs union and single market in 2021.
- Critics argue the analysis may overstate Brexit’s impact by not fully accounting for the strong performance of US tech and investment sectors and the European energy shock of 2022.
- Bank of England officials, including Governor Andrew Bailey, have become more open about the negative consequences of Brexit on growth, productivity, and market size, while noting that the hit to financial services was less severe than many feared.
- The research combines the Bank’s Decision Maker Panel (DMP) data—originally set up in 2016 to monitor Brexit effects—with five conventional estimation methods; while the DMP points to a 6 % hit, broader studies suggest an average impact closer to 8 %.
- Politically, Prime Minister Keir Starmer plans to pursue renewed cooperation with the EU on food, farm exports, electricity, and emissions trading, signaling a possible shift toward mitigating some Brexit‑related frictions.
Overview of the Study’s Main Finding
Economists who accessed confidential Bank of England data on thousands of British firms conclude that the UK economy is roughly 6 % smaller today than it would have been had the country remained in the EU. This estimate reflects the cumulative effect of Brexit over the ten‑year period since the 2016 referendum. The figure is derived from a reconstruction exercise: researchers modelled a counter‑factual growth path for the UK absent the decision to leave, then compared it with actual outcomes observed in the company‑level data.
Sources of the Economic Impact
The study attributes the 6 % loss to two roughly equal contributors. First, the immediate aftermath of the vote generated considerable surprise and uncertainty, which dampened investment, hiring, and consumer confidence. Second, once the UK formally exited the EU customs union and single market in 2021, new trade barriers—including customs checks, regulatory divergence, and reduced market access—began to weigh on export‑oriented industries. The authors note that the uncertainty effect was most pronounced in the first few years after the referendum, while the trade‑barrier effect grew steadily as the new arrangements took hold.
Criticisms and Limitations
Some economists caution that the study may overstate Brexit’s burden. They point out that the analysis does not fully isolate the boost the UK received from the strong performance of US technology and investment sectors, which helped sustain global growth during the same period. Additionally, the European energy price shock of 2022—which affected all EU members—might have indirectly influenced UK outcomes in ways that are difficult to disentangle from Brexit‑specific factors. These omissions, critics argue, could lead to an exaggerated estimate of the referendum’s economic cost.
Bank of England Officials’ Perspectives
In recent public remarks, Bank of England officials have been unusually candid about the Brexit drag. Governor Andrew Bailey told journalists that the level of economic activity and growth has been lower because Brexit reduced the size of the UK’s export markets. He emphasized that a smaller trading arena tends to depress growth, productivity, and overall market size. Bailey also clarified that, while the impact on financial services has been negative, it is “nowhere near as detrimental as many people predicted at the time,” suggesting that the sector has proved more resilient than early dire forecasts anticipated.
Methodology and Data Sources
The paper’s novelty lies in its use of the Bank of England’s Decision Maker Panel (DMP), a survey launched in 2016 expressly to monitor how businesses perceive and react to Brexit. The DMP captures firms’ expectations, reported impacts, and changes in financial accounts over time. By tracking responses across multiple years, the authors could gauge both the uncertainty channel and the trade‑barrier channel with a granularity not available in aggregate statistics. To bolster their findings, the researchers combined the DMP insights with five more traditional analytical approaches, such as gravity models of trade, synthetic control methods, and macro‑econometric simulations.
Comparison with Other Estimates
While the DMP‑based analysis yields a 6 % output loss, the broader suite of methods employed in the study points to an average impact closer to 8 %. This range aligns with other independent assessments that have placed the Brexit cost somewhere between 4 % and 10 % of GDP, depending on the assumptions about elasticity of trade, the speed of adjustment, and the treatment of external shocks. The discrepancy between the company‑level estimate and the wider average reflects differing sensitivities to short‑term volatility versus long‑term structural changes.
Political Developments and Outlook
Against this backdrop, Prime Minister Keir Starmer announced plans to meet EU counterparts at a July summit to negotiate agreements on food and farm exports, electricity trading, and emissions‑trading arrangements. The talks are expected to explore further areas of cooperation that could reduce non‑tariff barriers and improve market access for UK producers. Such diplomatic efforts signal a recognition that, while the decision to leave the EU is irreversible, targeted mitigations can alleviate some of the economic frictions identified in the Bank of England study.
Conclusion
The newly released research, grounded in confidential Bank of England company data, offers a concrete quantification of Brexit’s economic toll: a 6 % reduction in UK output over a decade, split evenly between early‑year uncertainty and later‑stage trade barriers. Although the study faces criticism for not fully capturing concurrent global dynamics—such as US tech strength and European energy shocks—it adds a valuable layer of evidence to the ongoing debate. Bank of England officials, including Governor Bailey, have acknowledged the drag on growth and productivity while noting that certain sectors, notably financial services, have fared better than early pessimistic projections. As the UK approaches the tenth anniversary of the referendum, the findings underscore the importance of continued dialogue with the EU to seek pragmatic solutions that can soften the lingering economic consequences of Brexit.