UK recession risk rises if Strait of Hormuz stays closed

A report dated August 2, 2026 warned that the UK economy could slide into recession next year if the Strait of Hormuz remains closed into 2027 in the context of a prolonged Iran war. The document said a swift reopening would limit the economic damage, while a sustained shutdown would intensify the impact.

The report also noted that market and policy responses would influence how the shock transmits through the economy. It said reaction was still pending, underscoring uncertainty around the next steps for shipping, insurance, and energy markets.

Strait of Hormuz scenario modelling and UK growth path In the scenario outlined, the report modelled UK gross domestic product slowing to 0.5% this year. It then projected a contraction of 0.2% in 2027 if the shipping lane stays closed into that period, according to the document.

The report described the Strait of Hormuz as a narrow route that handles a large share of seaborne oil. It said a prolonged closure could lift fuel costs and marine insurance costs, disrupt trade flows, and tighten conditions for households and firms.

Transmission channels: energy, supply chains, and financing The repoSources said the UK would feel the shock through higher energy prices, tighter global supply chains, and elevated freight premiums. It added that these factors could squeeze household real incomes and weigh on business investment.

According to the modelling cited, the growth drag would emerge as weaker consumer spending, slower factory output, and tighter financial conditions combine to reduce activity. The document framed these as reinforcing pressures rather than a single-point disruption.

The report emphasized that the timeline and duration of the closure are central to outcomes. If shipping resumes quickly, it said the UK would avoid outright contraction and that inflation pressures would be temporary.

If the closure persists into 2027, the report warned of a deeper hit driven by impaired trade and rising borrowing costs. It said this would amplify the effect of higher input costs and logistics constraints already reflected in the scenario.

Key dates and what policymakers and markets will track Officials and market participants are expected to watch developments through the winter, the repoSources said. It highlighted shipping conditions and conflict activity as core indicators, with particular focus by January 15, 2027.

The report’s central message is that the UK outlook in this scenario depends on whether the disruption is brief or prolonged. It presented the closure as a risk that can move from a temporary price shock to a broader demand and financing squeeze if it extends into 2027.