The foreign secretary, Jeremy Hunt, said on Saturday morning that Britain’s response would be ‘considered but robust’ if the British-flagged Stena Impero was not released, although he said the government was not contemplating military action. Iran’s Revolutionary Guards said they had captured the British-flagged Stena Impero, announcing the move two weeks after the British navy seized an Iranian tanker in Gibraltar, on suspicion of shipping oil to Syria in violation of an EU embargo