London, England (CNN) -- Protesters briefly disrupted a London oil conference Tuesday that BP boss Tony Hayward pulled out of a day earlier.
Just before the welcoming speech by BP Chief of Staff Steve Westwell, who was standing in for Hayward at the World National Oil Companies Congress, a woman got on stage and started shouting. Security quickly removed her.
The woman was Greenpeace campaigner Emma Gibson, who told the crowd that "because BP is incapable of telling you the truth, I'm going to tell you what you need to know".
Another Greenpeace campaigner, Katie Swan, got on stage with a banner reading "Go beyond petroleum," a take on BP's slogan.
"Ladies and gentlemen, we need to speed up progress and make a push to end the oil age," Gibson said on stage, according to Greenpeace.
