On the eve of the 2012 Olympics, Personal Best follows Britain's hottest young sprinters determined to succeed in this year's games. Filmed over four years, it shadows the athletes through the highs and lows of rigorous training, charting the triumphs and the agonising defeats, as they gear up both physically and mentally for the biggest competition of their careers.

A true portrait of what it takes to succeed and progress in athletics from grassroots level to the international stage, Personal Best reveals the victory, defeat, agony and ecstasy of elite athletes and the simple trials of growing up.

After the film we spoke to director Sam Blair, producer Jessica Levick, athletes Richard Alleyne and Omardo Anson, and Coach John Powell.