The Iran war risks bringing the G7's fastest-growing economy to a halt

• Business investment increased 1.7% in Q2, defying economist forecasts of a 0.5% decline, with growth driven by consumer spending during hot weather and the FIFA World Cup
• The U.K. is highly exposed to energy price shocks due to oil and gas imports, and the IMF warned the Iran conflict would hit U.K. growth harder than any other rich country
• Economists caution the strong first-half performance is 'likely too good to be true' with growth concentrated in services while construction and industrial production remain down year-over-year

Summary: UK Economy Growth Threatened by Iran Conflict

The UK economy demonstrated resilience in the first half of the year, growing 0.4% in Q2 following 0.6% expansion in Q1, positioning Britain as the G7's fastest-growing economy for the second consecutive quarter. Annualized growth reached a "scorching" 2% across the first half, according to Deutsche Bank. Business investment rose 1.7% in Q2, significantly exceeding forecasts that predicted a 0.5% decline.

Key Growth Drivers:

• Strong consumer spending driven by hot weather and FIFA World Cup performance
• Improved business confidence
• Shift from government spending to private sector activity

Major Risks:

The outlook is severely threatened by the Iran war and the closure of the Strait of Hormuz. The UK faces disproportionate exposure to this crisis due to heavy reliance on oil and gas imports and recent vulnerability to goods inflation. The International Monetary Fund warned in April that the conflict would impact UK growth more severely than any other developed economy.

Critical Concerns:

• Treasury officials reportedly modeled worst-case scenarios showing growth could plummet to just 0.3% next year if Strait of Hormuz disruptions persist
• Economists expect deterioration in the second half of 2026
• Growth remains concentrated in services; construction and industrial production sectors are declining year-over-year despite global infrastructure expansion

Analysts note the first-half performance may be "too good to be true," with typical seasonal patterns suggesting weaker growth ahead. Rising energy prices are expected to squeeze household incomes, though some economists see "modest upside risks" emerging for the first time recently.