US forces are concentrating in the Gulf ahead of a White House deadline, with about 3,000 airborne troops and 2,200 Marines deploying. The move is billed as securing the Strait of Hormuz and keeping trade flowing, nudging oil prices higher as regional capitals ready contingency plans.

Security agencies are probing a possible Iran link to arson attacks on four ambulances serving a Jewish community in north London. Specialist officers are leading the inquiry. The PM condemned the incidents as antisemitic and pledged stronger protection and a determined pursuit of those responsible.

The PM is under pressure to cap energy giants’ profits as fuel costs are set to rise amid Middle East tensions. The cost-of-living adviser urges a temporary cap and household support. Officials are drafting contingencies, including lower motorway speed limits and possible petrol rationing.

Economists warn fresh tax rises may be needed as a global energy disruption drives inflation and pushes up borrowing costs, straining the Treasury. Servicing the national debt is costing about £13bn a month, threatening to derail the Chancellor’s plans.