Bridgestone assure stewards on markings

The Williams driver conducted a run with what appeared to be a mixed set of tyres - with two tyres having the white band to signify they were the option tyre and two tyres being without the band to signify they were the prime.

Drivers are not allowed to mix their tyres in such a way, and the FIA race stewards subsequently looked into the matter to investigate whether there had been a breach of the rules.

This was cleared up, however, when it was discovered that all the tyres were of the 'option' variety, although two had not been painted with a white band.

A statement issued by the FIA said: "Enquiries have been made of the FIA technical assistance, the team manager of AT&T Williams and a representative of Bridgestone, and it is accepted that the tyres used by Nico Rosberg were indeed a 'set' but that two of the tyres had not been marked by Bridgestone with a white band.

"The Stewards have received assurances that procedures will be adopted to try and ensure that there can be no recurrence. In all the circumstances the Stewards propose to take no further action."