MCLAREN-MERCEDES
The silver cars were among the pacesetters throughout practice, but it was Heikki Kovalainen rather than local hero Lewis Hamilton - who had a notable grassy moment - leading the way. "We shouldn't get carried away with being fastest on Friday afternoon, but we've got a good basis for Sunday," Kovalainen said.

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RED BULL-RENAULT
Mark Webber, who lost time with an electrical problem in the morning, and David Coulthard were both in the top four in the afternoon session. Don't expect them to maintain those sorts of positions throughout the weekend, though -- in the media release, the pair respectively described the day as "not bad" and "normal".

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WILLIAMS-TOYOTA
Both cars were inside the top ten in the afternoon, but Kazuki Nakajima lost time after he spun and was collected by the barriers on the run to Bridge corner.

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TORO ROSSO-FERRARI
Sebastian Vettel, despite hardly knowing the Silverstone layout, was a top-seven contender throughout the opening day of practice, consistently a lot quicker than teammate Sebastien Bourdais.

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HONDA
Jenson Button, wearing a special helmet livery designed by a fan this weekend, and teammate Rubens Barrichello, looked more competitive in the afternoon, when they were in the top ten. Morning mileage was limited because of concerns about a suspension failure on Barrichello's car.