No action for Red Bull

The stewards stated that, while they did not accept all of Red Bull's arguments, there was no infringement of Article 5.5.3 of the technical regulations.

This means that Sebastian Vettel will be allowed to line up second on the grid for the race, with team-mate Mark Wark Webber eighth after a gearbox change.

The statement from the stewards read as follows: "The stewards received a report from the FIA technical delegate, along with specific ECU data from Red Bull Racing cars #1 and #2. The Stewards met with the team representatives and the representative of the engine supplier Renault.

"While the stewards do not accept all the arguments of the team, they however conclude that as the regulation is written, the map presented does not breach the text of Art 5.5.3 of the Formula 1 Technical Regulations and therefore decided to take no action."

The equivocal wording of the stewards' statement suggests that Red Bull might be not entirely within the spirit of the regulations. If the FIA is unhappy with what Red Bull is doing with its engine mapping, it is possible that there could be a rules clarification at a later date closing any potential loophole.