Donald Trump said the US will organise joint patrols of the Strait of Hormuz to secure oil flows, coordinating with Iran. He signalled that any breach of commitments by Tehran would trigger a strong US response, insisting the route must remain open to global trade.

Iran vowed steps that would sharply lift global oil prices after rejecting a 48-hour ultimatum from Trump. The PM convened a Cobra meeting as ministers assessed risks to energy supplies and shipping. Firms were warned about possible disruption and households about higher fuel costs.

Washington has prepared plans to deploy troops to seize Kharg Island, a strategic Gulf oil hub, following the president’s rebuke of Nato allies. The proposed operation would use naval and air support to secure facilities and exert pressure, with duration, risks and allied roles under review.

Saudi Arabia signalled it may take military action against Iran after incidents at Gulf energy sites pushed global oil and gas prices higher. Riyadh warned that further aggression will trigger a response, while markets and shipping lanes assess heightened risks to regional stability.