Epsom Derby 2012 preview: Balding and Carson's tips

BBC Sport's Clare Balding and Willie Carson look ahead to Saturday's Epsom Derby, where favourite Camelot will head the field.

The weekend's big race sees the smallest field for more than a century with just nine runners.

Aidan O'Brien trains the market leader and will also run stablemate Astrology, with Bonfire, Main Sequence, Mickdaam, Thought Worthy, Cavaleiro, Minimise Risk and Rugged Cross making up the field.