Paul Weaver and Giles Richards give their views on how the 2013 season will pan out. Stable rules mean this season could be as tight as ever, while teams may well have one eye on 2014 when huge changes come into play. Can one of the four other former championship winners knock Sebastian Vettel, winner for the last three seasons, off his perch?

F1 2013: season preview – video | guardian.co.uk.