Panorama's Darragh Macintyre investigates the truth about the boss of F1, Bernie Ecclestone, and asks why he is still in charge. Ecclestone has dominated Formula One motor racing for forty years and made billions from the sport. But two courts say he paid a $44m bribe, a judge recently concluded that it was 'impossible to regard him as a reliable or truthful witness', and he may have avoided a billion pounds of UK tax.