This is not acceptable to the billionaire and so he has demanded his miners and metalworkers join police on patrol on Mariupol. As pro-Russian rebels declaring independence seized public buildings across the steel and coal belt which is the basis of his colossal fortune, he issued repeated written statements in support of a united Ukraine... but the media-shy 47-year-old, who has a workforce of 300,000 people on his payroll in the Donbass, has to tread carefully around local sensitivities and has avoided specifically condemning the action