The threat of a boycott of the United States Grand Prix is firmly on the table following a meeting of the owners of Lotus, Force India and Sauber.

Pirelli head into practice for the German Grand Prix under enormous pressure to prove their tyres are safe after the drivers threatened a boycott should their lives again be placed at risk.

World governing body the FIA has accused Edouard Michelin of “an almost comical lack of knowledge” after he threatened to pull his tyre company out of Formula One.

The FIA World Motor Sport Council today rescinded the guilty verdicts of the seven teams who failed to race in the United States Grand Prix last month.