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UK firms report slide in activity due to Iran war and political turmoil

Published by Global Banking & Finance Review

Posted on May 21, 2026

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· Last updated: May 21, 2026

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UK Firms Report Steep Activity Drop Amid Iran War and Political Uncertainty

Economic Impact and Business Sentiment in the UK

By William Schomberg

Survey Reveals Widespread Decline

LONDON, May 21 (Reuters) - British companies are suffering their most widespread drop in activity in over a year due to the economic fallout from the Iran war and political uncertainty at home, a survey showed on Thursday.

Key Indexes and Sector Performance

Data company S&P Global's preliminary UK Composite Purchasing Managers' Index for May tumbled to 48.5 from 52.6 in April, its first reading below the 50.0 growth threshold since April 2025 and far below the 51.6 median in a Reuters poll.

Services and Manufacturing Trends

A measure of activity among services firms plunged particularly sharply to its lowest since January 2021 when Britain was in the grip of the COVID-19 pandemic.

Manufacturing firms reported a rush of orders but the increase was largely due to clients trying to get ahead of possible further price increases or supply chain problems linked to the Iran war.

Political and Economic Uncertainty

As well as the hit from higher energy prices and shipping delays caused by the conflict in the Middle East, businesses said uncertainty about the future of British Prime Minister Keir Starmer and who might succeed him were hurting confidence.

"The UK economy is facing a perfect storm as rising political uncertainty adds to the growing impact from the war in the Middle East," Chris Williamson, chief business economist at S&P Global Market Intelligence, said.

Outlook and Policy Implications

Economic Forecasts

Williamson said the reading suggested Britain's economy was on course to contract by a quarterly 0.2% in contrast to an unexpectedly strong start to the year.

Inflation and Cost Pressures

Businesses faced another hefty increase in their bills - only slightly below April's jump, which was the biggest in more than three years - led by greater energy costs caused by the Iran war and higher wages. 

While the survey's overall measure of businesses' selling prices also rose by slightly less than in April, manufacturers increased their prices by the most since July 2022.

Employment and Future Expectations

Companies scaled back their hiring plans for the 20th month in a row and expectations for future business were the lowest since April 2025.

Bank of England's Dilemma

Williamson said the combination of weakening activity and still strong inflation pressures left the Bank of England in a quandary.

Financial markets expect the BoE to raise interest rates twice over the remainder of 2026 but most economists polled by Reuters earlier this month thought it will stay on hold.

(Writing by William Schomberg; Editing by Toby Chopra)

Key Takeaways

  • Neutral composite PMI at 48.5 signals a contraction in UK private-sector activity as of May 2026—first reading below 50 since April 2025, underlining deteriorating conditions in services and business sentiment (tradingeconomics.com)
  • Inflation pressure persists: Iran war-driven surges in energy costs have lifted UK inflation forecasts—CPI rose from 3.3 % in March to 2.8 % in April, but BoE forecasts inflation could hit as high as 6.2 % under adverse scenarios (investing.com)
  • Political uncertainty intensifies headwinds: Internal turmoil within the Labour Party—including mounting leadership challenges to Prime Minister Starmer after poor local election results—has weighed on business confidence and financial markets (apnews.com)

References

Frequently Asked Questions

Why are UK companies seeing a drop in activity?
UK companies report a widespread decline in activity due to the economic effects of the Iran war and rising political uncertainty in Britain.
How much did the UK Composite Purchasing Managers' Index fall?
The UK Composite PMI fell to 48.5 in May from 52.6 in April, marking its first drop below 50.0 since April 2025.
Which sectors were most affected by the recent economic downturn?
Services firms experienced the sharpest decline since January 2021, while manufacturers saw increased orders mainly due to concerns over price and supply chain risks.
What factors are contributing to higher business costs in the UK?
Rising energy costs from the Iran war, shipping delays, and higher wages have led to increased business expenses.
How is the Bank of England expected to respond to these economic challenges?
Though financial markets expect two interest rate hikes by the Bank of England, most economists forecast that rates will be held steady amid lingering inflation and weakening growth.

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