The Prince’s purge: Mohammed Bin Salman’s moves to reform Saudi Arabia. Kate Adie introduces stories, wit, and analysis from correspondents around the world.Frank Gardner chronicles the meteoric rise of the Crown Prince reshaping Saudi Arabia.Kate Lamble meets the campaigners struggling to convince Muscovites that Alexei Navalny should be the next Russian President. They complain of political apathy and hostile media.Xavier Zapata mingles with the young Catalonians newly energised and politically engaged by the independence debate but struggling to get their voices heard.