UK economy shows resilience in March despite Iran war fallout

The United Kingdom’s economy expanded by 0.3% in March 2026, the first month after the outbreak of the Iran war, surpassing analysts’ forecasts of a decline [1]. Growth was driven by both services and output, while production slipped slightly, suggesting a mixed but overall robust performance amid emerging geopolitical shocks.

Key takeaways

• UK GDP rose 0.3% in March, the first month after the Iran war began [1].
• Services grew 0.3% and output rose 1.5%, offsetting a 0.2% fall in production [1].
• The services sector contributed a 0.8% boost to quarterly growth, with wholesale and retail trade leading the gains [1].
• UK officials cite the result as evidence that the government’s economic plan is working, while opposition voices warn political instability could undermine the recovery [1].
• Iran’s own economy is projected to deteriorate sharply over the next two to four months, with high inflation and export disruptions, raising concerns about broader regional spillovers [2].

March growth defies war‑time expectations

The Office for National Statistics reported that the UK’s economy grew by 0.3% in March, marking the first month of growth after the Iran war erupted in April [1]. Economists had expected a contraction, anticipating that the conflict would dampen trade and investment flows. Instead, the data showed a modest expansion, with the services sector—particularly wholesale and retail trade—adding a 0.3% increase to the monthly figure. Output, measured across manufacturing and other non‑service activities, rose sharply by 1.5%, while traditional production fell by 0.2% [1].

Chancellor Rachel Reeves hailed the numbers as proof that “the right economic plan” is taking effect, warning that a leadership contest could “plunge the country into chaos” [1]. Shadow chancellor Mel Stride, however, argued that political turmoil was “destabilising Britain’s economy” [1]. The divergent political commentary underscores the delicate balance between economic performance and political stability.

Regional context and potential spillovers

While the UK’s domestic data suggest resilience, the broader regional outlook remains precarious. Iran entered the war already weakened, with inflation above 50% and a sharply depreciated rial by late 2025 [2]. The conflict has damaged key export sectors—petrochemicals and metals—reducing export revenues that previously generated $25‑30 billion annually [2]. Analysts project that over the next two to four months Iran will face “severe stagflation,” with high inflation, rising unemployment and falling real incomes [2].

Even though the UK’s growth figures do not directly reflect Iranian economic distress, the proximity of the two economies and the potential for disrupted trade routes—particularly through the Strait of Hormuz—could introduce indirect pressures on British businesses reliant on Middle‑East energy supplies. The situation highlights the importance of monitoring how regional instability may translate into supply‑chain and price effects for the UK.