The Strait of Hormuz carries roughly 20% of the world’s petroleum liquids, and a closure would instantly tighten global supply. For the UK, which imports about a quarter of its crude oil and a large share of refined products through the route, the immediate market reaction would be higher Brent futures and spot prices, pressuring fuel costs across transport and industry sectors.
Beyond price spikes, the UK would confront broader ramifications: strategic petroleum reserves would be tapped, alternative import routes such as the Mediterranean or increased LNG cargoes would be negotiated, and policymakers would need to balance short‑term energy security with longer‑term decarbonisation objectives.