Iran issued a fresh warning over Gulf shipping, heightening fears of an energy crunch. Delayed cargoes and higher risk premiums lifted oil and gas prices. Ministers and suppliers warned of pressure on bills, urging calm while contingency measures and diplomatic channels are pursued.

Israel carried out a military operation against Iran’s South Pars gasfield, part of the world’s largest. The move pushed oil prices higher and prompted warnings of retaliation, raising concerns over energy security and the risk of wider regional instability.

UK sources say Geneva talks had brought a new Iran nuclear deal close, with tougher inspections and phased sanctions relief under discussion. A senior UK adviser noted the surprising progress, but a subsequent regional crisis halted the negotiations.

Starmer says the UK will resist US pressure to take part in military action against Iran, calling it a difficult decision. He ruled out sending Royal Navy ships and dismissed threats tied to Nato, stressing Britain’s commitment to the alliance while prioritising diplomacy with European partners.