No one had tested on wet tyres all weekend so the riders just had to jump on their bikes and ride them.

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"In October 2002, the F1 teams unanimously voted to change the rules to limit wet tyres to one type, " the FIA said.

BBC: Tyre rules set for rethink

In a chaotic final couple of laps, Heidfeld jumped from eighth to third place on the track with what he called a "hero or zero decision" to come in for wet-weather tyres with two laps to go.

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James Toseland's best finish of the year in seventh came after he changed tyres early on in wet conditions.

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