When the UK economy shrank by 0.1% in April 2026, the official reason given by the Office for National Statistics was the same one that has been squeezing household budgets for months: the Iran war. The conflict, which began with Iran closing the Strait of Hormuz, sent oil prices surging and has now started to drag down Britain's economic growth.
The contraction in April – the first monthly fall since August 2025 – followed a stronger-than-expected 0.3% rise in March. It was driven by a 0.2% decline in services output, partly offset by a 0.1% rise in construction. The services sector was hit by the cancellation of sporting events in the Middle East that affected UK-based businesses, as well as broader consumer caution. Over the three months to April, the economy still grew by 0.7%, but economists warn that more pain is coming.
“UK GDP fell 0.1% in April due to Iran war oil price rises; explains impacts on households and economy.”
The root cause is the surge in oil prices caused by the closure of the Strait of Hormuz, a key shipping route for global oil tankers. Brent crude briefly hit $120 a barrel, though it later fell to a three-month low of $86 on hopes of a resolution. These price spikes have flowed directly into UK petrol and diesel prices, and household energy bills are set to rise further when the energy price cap increases in July.
Higher energy costs affect almost everything. Businesses face rising input costs, but with consumers already cutting back, they cannot easily pass those costs on. That squeezes profit margins and may lead to job cuts. Consumers, bracing for higher bills, have signalled their intention to save more and spend less, which will further weigh on economic activity. The Bank of England is expected to keep interest rates unchanged at its next meeting, as it balances the risk of inflation against a slowing economy.
For UK readers, the practical impacts are already visible: higher prices at the pump, rising household energy bills, and a sense that the economy is losing momentum. Chancellor Rachel Reeves said the war “will have an impact at home” but argued that the economy was in a stronger position to cope thanks to previous policy choices. Shadow chancellor Mel Stride criticised the government's spending priorities, saying “putting Benefits Street first leaves the economy weaker.”
Q: How does the Iran war cause UK fuel prices to rise? Iran closed the Strait of Hormuz, a narrow waterway through which a huge share of the world's oil is shipped. This disruption cuts supply and pushes up the global oil price. UK petrol and diesel prices rise as a result, and the effect then extends to household energy bills and the cost of many goods and services.
Q: What is GDP and why does a monthly contraction matter? Gross domestic product (GDP) measures the total value of goods and services produced in the UK. A monthly contraction of 0.1% may sound small, but when it is the first fall in eight months, it signals a turning point. Economists say the April figure is more indicative of the coming slowdown than the stronger quarterly figure, because it reflects the immediate impact of higher costs on spending.
Q: Will interest rates go up or down next? Most analysts expect the Bank of England to keep interest rates unchanged when it meets next week. The conflict has pushed up inflation via energy prices, which might normally trigger a rate rise. But the economy is also weakening, which argues against tightening. The Bank is likely to wait and see how the conflict evolves before making any move.
What happens next depends largely on the Iran war. If a resolution is reached, oil prices could fall quickly, as they did when they sank to a three-month low of $86 on hopes of peace. If the conflict drags on, the UK could see a second-quarter contraction. The energy price cap rise in July will be a key test of consumer resilience, and the Bank of England's next decision will be closely watched. For now, the economy is navigating a period of “renewed fragility”, as KPMG's chief economist put it, with pressure on both households and businesses likely to persist.