Britain's manufacturing sector has experienced the most significant monthly surge in input prices in over three decades, driven by severe supply chain disruptions caused by the ongoing Iran war, according to a closely watched economic survey.
Historic Inflation Spike
The S&P Global UK manufacturing purchasing managers' index (PMI) survey, a key benchmark for economists, reported that the input price inflation index leaped by 15 points between February and March 2026. This represents the largest monthly increase since September 1992, when the UK exited the European Exchange Mechanism on Black Wednesday.
Production Contraction and Delivery Delays
Concurrently, manufacturing production contracted in March for the first time in six months, marking a reversal in recent growth trends. The overall PMI reading declined to 51 in March from 51.7 in February, falling below the preliminary estimate of 51.4. Any figure above 50 indicates expansion, while below signifies contraction.
The survey highlighted that delivery times lengthened substantially due to the Middle East conflict, with ships forced to reroute around the blocked Strait of Hormuz, a critical global shipping lane. This resulted in the most pronounced deterioration in supply chain performance since mid-2022.
Expert Analysis and Sector Impact
Rob Dobson, director at S&P Global Market Intelligence, commented: "UK manufacturing output contracted for the first time in six months in March, as the war in the Middle East and ongoing concerns about domestic economic policy led to a scaling back of production. The impact of the war also caused noticeable shifts in the cost and supply chain backdrops."
He added: "Delivery times lengthened to the greatest extent since mid-2022, while the acceleration in input price inflation was the steepest since the aftermath of the UK's withdrawal from the ERM in 1992."
The survey data revealed that nearly half of companies (49%) reported higher purchase prices in March, with only 2% experiencing decreases. The Iran conflict exerted a "marked" influence on supply chains, with average vendor delivery times deteriorating at the fastest rate in more than four and a half years.
Broader Economic Implications
This development underscores the vulnerability of the UK manufacturing sector to geopolitical instability and its ripple effects on global trade routes. The combination of soaring input costs and production decline poses challenges for economic resilience and inflationary pressures in the broader economy.
