The Impact of the Iran Conflict on the Global Economy: The UK Faces Its Most Severe Economic Challenge

In a recently released report, the Organization for Economic Co-operation and Development (OECD) warned that the conflict involving Iran would have widespread repercussions for major global economies, with the United Kingdom, in particular, facing the most severe economic shock. Although the conflict is reverberating across the global economy, the OECD projects that the UK—as one of the world's developed market economies—will experience a more pronounced impact than other nations.

In its latest economic outlook, the OECD significantly downgraded its global economic forecasts, making a particularly pessimistic adjustment to the UK's prospects. The report projects that the UK's inflation rate will reach 4% this year—1.5 percentage points higher than the previously forecast 3%—while economic growth in 2026 is expected to be a mere 0.5%, a downward revision of 0.5 percentage points from earlier projections. This represents the largest downward adjustment made by the OECD among all major global economies.

In this context, the conflict involving the United States, Israel, and Iran has already exerted a significant influence on the global economy. Consequently, central banks worldwide have lowered their economic growth forecasts while simultaneously raising their inflation expectations in response to surging international oil and gas prices. The OECD notes that the conflict has exacerbated global economic uncertainty, rendering the economic outlook highly unpredictable.

The OECD further points out that the ongoing conflict in the Middle East is severely testing the resilience of the global economy, particularly regarding energy prices. Iran's blockade of the Strait of Hormuz—coupled with attacks on regional energy infrastructure—has triggered a surge in global energy prices and disrupted the supply of critical commodities, including fertilizers. This confluence of factors has driven up global energy costs, thereby dampening demand and intensifying inflationary pressures.

The UK's vulnerability amidst this energy crisis is particularly evident. Given its reliance on imported oil and natural gas, combined with limited domestic gas storage capacity, the country is more susceptible to energy price volatility than its international counterparts. Although the Consumer Price Index (CPI) held steady at 3% in February, it is projected to rise further due to the upward trajectory of energy prices. Concurrently, the UK's economic growth outlook has become increasingly bleak. Due to intensifying inflationary pressures, the Bank of England—which had originally been expected to cut interest rates this spring—saw that expectation quickly dashed following the outbreak of war. Instead, some economists now suggest that if the conflict proves protracted, interest rate hikes could become the prevailing trend in the future.

The OECD has also emphasized that, in the face of rising inflationary pressures, central banks must remain highly vigilant to ensure that inflation expectations remain anchored. Should price pressures broaden further or economic growth experience a sharp downturn, central banks may need to adjust their monetary policies. For the UK specifically, the Bank of England’s monetary policy decisions will entail increasingly complex choices. Although interest rate cuts were previously anticipated to benefit borrowers and businesses, the persistence of the war may render monetary policy adjustments—potentially in the opposite direction—all the more urgent.

In response to soaring energy prices, the UK government has announced measures to assist those groups most severely affected by the rising costs. However, Shadow Chancellor Rachel Reeves has explicitly stated that the government will not introduce a comprehensive subsidy scheme to help households pay their energy bills. Reeves affirmed that the government remains strictly committed to fiscal discipline and pledged not to relax fiscal rules on account of the conflict involving Iran. In her view, controlling government borrowing and reducing national debt remain the government's top priorities; any loosening of fiscal policy could entail negative long-term consequences.

Financial markets are monitoring this situation closely, with widespread speculation as to whether the Labour government might adopt a more flexible fiscal response given the current circumstances. Nevertheless, Reeves has maintained that the government's commitment to fiscal discipline will not waver in the face of external conflict, and that future fiscal policy will continue to be executed in strict adherence to established rules.

Overall, the outbreak of the conflict involving Iran poses severe challenges to the global economy, and for the UK in particular, the economic outlook appears increasingly bleak. Soaring energy prices, disruptions to global supply chains, and intensifying inflationary pressures have rendered the UK's economic landscape significantly more complex. The OECD has sharply downgraded its economic forecasts for the UK, leaving policymakers facing heightened uncertainty regarding both inflation and economic growth prospects. The Bank of England and the UK government will play pivotal roles in navigating this crisis; balancing the dual pressures of controlling inflation and fostering economic growth will be the critical challenge in the months and years ahead. Furthermore, the OECD report cautions central banks to remain vigilant and adjust monetary policy in a timely manner to ensure the stable functioning of the economy. For the UK, the steadfastness and flexibility of fiscal policy will be key factors in maintaining economic stability—a challenge made all the more difficult by the complex landscape of the global economy.