JAGSHEMASH, America! Sacha Baron Cohen, the Cambridge-educated comedian who gave the world Ali G, the idiotic, tracksuited rapper from the West Staines Massive, is about to test America’s sense of humour to the limit. Baron Cohen has finished shooting his new film, which centres on a crazed journey across America in an ice-cream van by his moustachioed character Borat Sagdiyev, a fictional Kazakh television reporter with the meaningless catchphrase. While some of the film is scripted, much of it sees Baron Cohen, 34, mercilessly baiting luckless Americans who fail to twig that he and his film crew are actors. Insiders...