Lewis Hamilton meets nine-year-old racer Harley Haughton

Newly-crowned Formula 1 champion Lewis Hamilton surprises nine-year-old karting champion Harley Haughton in the 5 live studio.

On the same day that Hamilton secured the 2014 Formula 1 championship Haughton won the Manchester and Buxton Kart Club Honda Cadet Championship at the Three Sisters circuit near Wigan.

Hamilton also meets Harley's father and mechanic Dave, and talks about the influence of his own father Anthony on his career.