Who's improved most since F1 testing? Edd Straw's trackside verdict

Formula 1's return to Bahrain six weeks after pre-season testing presents a rare opportunity to compare cars of today and a month-and-a-half ago from trackside.With teams running similar programmes in Friday practice, it meant a far narrower distribution than witnessed in the scattergun of testing. Even with only two hours to watch them in action, it’s at least easier to know you are comparing lik...