28 September 2012 Last updated at 11:56

Lewis Hamilton 'lost faith' in McLaren - Andrew Benson

BBC Sport's chief F1 writer, Andrew Benson believes Lewis Hamilton decided to leave McLaren for Mercedes because he has "lost faith" in his team.

Hamilton has signed a three-year deal to race for Mercedes from next season, and Benson says the move is a blow for McLaren as they have lost "the fastest driver in F1".

The deal has forced Michael Schumacher out of Mercedes, while Sauber's Sergio Perez will replace Hamilton at McLaren.