3 March 2012 Last updated at 12:02

BBC F1 analyst Gary Anderson on the upgraded Red Bull

BBC F1 technical analyst Gary Anderson gives his verdict on the upgraded Red Bull, which made its first appearance in testing at Barcelona on Saturday after a major redesign.

Red Bull have so far had a low-key but quietly impressive pre-season programme, but the team hope the latest upgrades can boost their chances of having as strong a season as in 2011, when they won a second successive contructors' world title and also the drivers' title with Sebastian Vettel.

The F1 teams are currently testing in Barcelona ahead of the season opener in Melbourne on Sunday, 18 March.