UK firms report sharp activity drop amid Iran war economic fallout

What happened

The New Arab reports that British companies are experiencing their most widespread drop in activity in more than a year, driven largely by economic fallout from the ongoing Iran war and coupled with uncertainty about UK political leadership. Data from S&P Global’s preliminary UK Composite Purchasing Managers' Index (PMI) for May revealed a tumble to 48.5, falling below the 50 threshold for growth for the first time since April 2025.

Outside Brief is treating this as a source-led account. Any disputed responsibility, casualty figure or battlefield claim should be read as unconfirmed/hearsay unless confirmed by another reliable source. The PMI data indicated a particularly sharp decline in services sector activity, reaching the lowest point since January 2021 during the height of the COVID-19 pandemic. Meanwhile, manufacturing firms saw an increase in orders, which the survey attributed primarily to customers attempting to preempt anticipated price hikes or supply chain disruptions linked to the Iran conflict.

Higher energy prices and shipping delays related to the Middle East war were named as significant factors weighing on business costs and operations. Additionally, domestic political uncertainty revolving around the future leadership of UK Prime Minister Keir Starmer was noted as further eroding confidence among business leaders.

Known from the source

• S&P Global's preliminary UK Composite Purchasing Managers’ Index for May dropped to 48.5 from 52.6 in April 2026.
• The PMI reading fell below the 50 growth threshold for the first time since April 2025.
• Services sector activity declined to its lowest since January 2021.
• Manufacturing firms reported increased orders, attributed to anticipated price rises and supply chain concerns.
• Higher energy prices and shipping delays related to the Iran war were identified as key economic headwinds.

What remains unclear

Chris Williamson, chief business economist at S&P Global Market Intelligence, characterized the situation as a “perfect storm,” suggesting the UK economy may contract by 0.2% in the current quarter, reversing earlier gains for the year. Inflationary pressures linked to energy costs remain elevated, complicating Bank of England's monetary policy outlook amid expectations of rate hikes later in 2026.

What remains unclear: Verification that the decline in UK business activity is directly linked to the Iran war impacts rather than broader global economic factors. Current status of UK political uncertainty about Keir Starmer’s leadership and its influence on business confidence. Confirm latest PMI readings and any subsequent economic data releases following the source article date. Check for any official UK government or Bank of England statements regarding economic outlook and Iran war implications.

Evidence note

Outside Brief has kept this brief source-led and attributed. Claims should be read alongside the original source linked below.

Original source: The New Arab. Open the source.