Date Friday March 1 2013Driver Jenson ButtonLocation Circuit de CatalunyaTrack length 4.655kmLaps/km 72/335Best laptime 1m 23.181s

Programme The anticipated heavy showers largely held off and the majority of the days running was conducted on a dry track. A still-damp morning meant Jensons early running was limited to aero mapping and a couple of mechanical evaluations.

As the circuit dried out, Jenson switched to Pirellis Medium compound and ran through anumber of different mechanical set-up iterations to find a good balance for MP4-28. Theprogramme was efficient and productive, with Jenson going quicker on each subsequent run.By mid-afternoon, the team was able to evaluate a number of upgrades over a series of longerruns. While these were interrupted by a late-afternoon red-flag stoppage, Jenson was still ableto log some considerable mileage and even incorporate a series of live pitstop simulations intothe mix.

Whats next Saturday is Checos final day in the car before Melbourne. With clearer weather forecast, theaim will be to quickly run through further mechanical and aerodynamic evaluations beforecontinuing more set-up work.