BP has removed Irish chairman Albert Manifold with immediate effect, saying today that the decision followed concerns over governance standards, oversight and conduct, just months after he was brought in to help steer a strategic reset. His exit, after roughly eight months in the role, adds to a turbulent period for the oil major, which has been rocked by scandal and repeated upheaval at the top. Less than three years ago, former BP chief executive Bernard Looney was dismissed after misleading the board about personal…