The weather warmed up slightly on Thursday morning for the third day of this week's test in Valencia with the strong winds of Tuesday and Wednesday calming down.

Jenson Button joined the team, taking over from Anthony Davidson in chassis 007-01. He did a couple of short runs to find a good balance in the car before moving onto a chassis and tyre development programme. He completed 50 laps during the morning session before a planned engine change over the lunch break.

Takuma Sato's morning programme was delayed as he had an engine failure early in the session. With the engine changed, Takuma went back out in the car to start his planned chassis and gearbox tuning development work. He completed 19 laps in the morning session.

Jenson began the afternoon continuing his chassis and tyre evaluation from this morning. He completed a further 19 laps on his planned programme bringing his final lap tally for the day to 69 laps.

Takuma's afternoon was spent completing long run tyre evaluations with the best of the morning's test sets. He also ran through some suspensions settings to complete a total of 84 laps for the day. Takuma will remain in chassis 007-02 tomorrow with Anthony returning to drive chassis 007-01.

Valencia test times - Thursday

Driver	Team	Best Time
David Coulthard	Red Bull Racing	1:09.173
Antonio Pizzonia	Williams	1:09.449
Vitantinio Liuzzi	Red Bull Racing	1:10.238
Fernando Alonso	Renault	1:10.403
Jarno Trulli	Toyota	1:10.646
Takuma Sato	Lucky Strike B.A.R. Honda	1:11.148
Giancarlo Fisichella	Renault	1:11.286
Olivier Panis	Toyota	1:11.465
Jenson Button	Lucky Strike B.A.R. Honda	1:11.561
Andy Priaulx	Williams	1:12.781