FILE PHOTO: Stena Impero, a British-flagged vessel owned by Stena Bulk, is seen at undisclosed place off the coast of Bandar Abbas, Iran August 22, 2019. Nazanin Tabatabaee/WANA (West Asia News Agency) via REUTERS./File Photo

STOCKHOLM (Reuters) - The British-flagged tanker Stena Impero detained by Iran in July is preparing to leave, Will Marks, a spokesman at the vessel’s Swedish owner Stena Bulk said in a text message.

According to Refinitiv ship-tracking data, the tanker started moving and exited the Bandar Abbas port in Iran on Friday.