Reuters: BP has tapped HSBC to sell its stake in the Nam Con Son gas project in Vietnam, as it scrambles to hive off $30 billion of assets to pay for the clean-up of the worst oil spill in U.S. history, three sources said. The British oil giant, which is on a campaign to sell a host of assets from Pakistan to Egypt, said last week it is seeking a buyer for its stake in the Nam Con Son gas project offshore southern Ho Chi Minh City, worth $966 million by one estimate. India’s state-run …