The car appears to include a number of innovative features - including a top to the chassis in front of the cockpit which is lower than on other cars, and a more extreme aerodynamic treatment in front of the sidepods alongside the driver.

BBC: Red Bull expect wins from new car

Red Bull are running with a new 'double' diffuser in the Principality while championship leaders Brawn also have a series of modifications, including a new rear wing configuration, changes to the car's suspension and a reconfigured chassis to suit the tight, twisty track.

BBC: Rosberg sets Monaco practice pace