The ongoing Renault saga now focuses in on head of engineering Pat Symonds, who has reportedly been offered immunity by the FIA if he answers some questions. A steward's report seems to hint he knows too much:

On 28 August, Mr Symonds was summoned back before the Stewards to be asked if he wanted to give further information on the questions he had declined to answer. Mr Symonds again declined to answer the questions.

A transcript of the conversation between FIA representatives and Pat Symonds has also been published. It includes an awful lot of "don't", "won't" and "can't" quotes.