Driver - Jenson Button
Location - Circuito de Jerez
Track length - 4.423km
Weather - Blustery winds throughout the day, with a rain shower in the late afternoon.
Laps completed - 70
Kilometres covered - 310km
Best laptime - 1m22.278s
A frustrating day of running, with windy conditions compromising our data gathering programme and affecting efforts to find a satisfactory set-up for the MP4-26.
Jenson was unable to find a suitable balance with the car, and the team's progress was brought to an early end in the middle of the afternoon following the failure of an internal component.
Duration of test - Four days (February 10-13)
Next test - Circuit de Catalunya, Barcelona (February 18-21)