Press Association: Link to this video The climate change protester who threw green custard over Peter Mandelson has been arrested, Scotland Yard said today. Leila Deen, 29, attended a police station in central London “by arrangement” yesterday, according to a Metropolitan police spokesman. “She was arrested by officers from Westminster CID and was bailed to return to a central London police station on a date in early April,” he added. Mandelson, the business secretary, today …