◢ An oil tanker run by BP Plc is being kept inside the Persian Gulf in fear it could be seized by Iran in a tit-for-tat response to the arrest by Gibraltar last week of a vessel hauling the Islamic Republic’s crude. The British Heritage, able to haul about 1 million barrels of crude, was sailing toward Iraq’s Basrah oil terminal in the south of country when it made an abrupt u-turn on July 6.