Iran War Pushes UK Fuel Prices to Three Year High

Conflict Drives Inflation Beyond Target

UK inflation accelerated to 3.3% in March from 3% in February , marking its highest level since December as the ongoing conflict in Iran sent shockwaves through global energy markets. Higher motor fuel was the main driver of the acceleration in inflation, increasing by 8.7% month-on-month – the largest increase since June 2022, shortly after the Russian invasion of Ukraine.

The dramatic surge in fuel costs hit British families directly at the pump. The average price of petrol rose by 8.6p per litre between February and March to 140.2p per litre, marking the highest price since August 2024. Diesel drivers faced an even steeper increase, with prices jumping by 17.6p per litre in March to an average of 158.7p per litre, the highest price since November 2023.

Chancellor Rachel Reeves acknowledged the external nature of the crisis, stating that "the Iran crisis was not our war, but it is pushing up bills for families and businesses" across Britain. The rise in the overall rate of inflation drives the UK further away from the 2% inflation target set by the Government and the Bank of England.

Beyond the Petrol Station

The energy shock rippled through multiple sectors of the economy. Air travel costs increased significantly, with inflation of 14.5% compared with the same month last year, marking the highest rise since July last year. While analysts partly attributed this to Easter holiday timing, the underlying fuel cost pressures remain a concern for the travel industry.

Food and non-alcoholic drink prices accelerated to 3.7% year-on-year in March from 3.3% inflation in the previous month, including another acceleration in the price of sweets and chocolates, which were up 10.6% year-on-year. The Food and Drink Federation has predicted the rate could hit 9% by December, as the closure of the Strait of Hormuz hits global fertiliser supplies.

Not all sectors contributed to inflationary pressure. Clothing and footwear had a downward pressure on inflation, as prices dipped 0.8% for the month, with sales and discounting activity pulling inflation in the category to its lowest level since March 2021. This suggests consumers are cutting discretionary spending in response to higher essential costs.

Central Bank Dilemma

Prior to the escalation of the Iran war, there was a growing consensus that the central bank would reduce its main interest rate from 3.75% as inflation appeared to be heading back toward the official 2% target. Now policymakers face a much more complex decision. With inflation now expected to potentially hit 4% in the coming months, the Monetary Policy Committee faces a much more difficult decision during its meeting next week.

Economists are divided on the appropriate response. Investment strategist Lindsay James argues that "a rise in rates risks misdiagnosing the problem. This inflationary pulse is being driven by supply disruption, not excess demand. Higher interest rates will do nothing to increase the flow of oil or other goods from the Middle East."

Martin Beck, chief economist at WPI Strategy, warned that "how far inflation rises from here will depend heavily on developments in the Middle East. If recent signs of diplomatic progress translate into a sustained easing in tensions and energy supplies normalise, inflation could peak at about 3.5-4% this summer. But a renewed escalation could just as easily push inflation towards 5%."

Economic Uncertainty Ahead

The inflation trajectory from here depends almost entirely on the Strait of Hormuz, and the Strait of Hormuz depends on whether Iran's fractured leadership can produce a unified negotiating position — which Washington does not expect for at least six weeks. This uncertainty leaves both policymakers and consumers in a precarious position.

The first cost-of-living crisis took two years to build. The second has taken one month. With energy supplies remaining constrained and diplomatic solutions still elusive, British households face the prospect of sustained pressure on their budgets just as the economy was showing signs of recovery.

The speed and severity of this inflation surge demonstrates how quickly global conflicts can translate into domestic economic pain, challenging policymakers to navigate between controlling prices and supporting growth in an increasingly volatile world.