Man behind Iran seizure audio says UK warship stood no chance Head of shipping risk management company, Dryad Global, says that the British-flagged tanker, Stena Impero, seized by Iran in the Gulf played out over a chaotic 20-40 minutes while a UK warship raced in from an hour away, adding that his global clients are starting to look for alternatives to using British-flagged vessels in the Gulf. IMAGES AND SOUNDBITES