Before Albert Manifold’s abrupt dismissal, tensions rose over everything from secret deal talks to Wimbledon tickets BP this week ousted Chairman Albert Manifold, shown here in 2014. Chris Ratcliffe/Bloomberg News LONDON—BP’s BP 1.32%increase; green up pointing triangle ousted chairman clashed with a fellow director earlier this year over the handling of sensitive talks about a potential deal, a sign of simmering boardroom tensions months before Albert Manifold’s abrupt dismissal this week.