Williams unveil their challenger for the 2005 season, the FW27, hoping for a turnaround in fortunes on the track

Much rest on the shoulders of Australian driver Mark Webber, who joins Williams after two seasons at Jaguar

Antonio Pizzonia and Nick Heidfeld sit side by side after Frank Williams revealed that Heidfeld had been chosen to partner Webber in 2005

German Heidfeld wins out over his Brazilian rival after impressing sufficiently in recent tests

The launch in Valencia showcases the FW27 which Williams hope will see them catch ground with Renault and BAR

Heidfeld has little time to celebrate his success as he is straight out on the track putting the FW27 through it's paces