Car identification... CW: It was not always easy on television to differentiate between the orange and yellow on-board cameras fitted on top of the main roll structure. We thought it would be easier to distinguish with one black and one yellow-striped car. We tried it last year with Ferrari at a race and it was a significant improvement. The one without the coloured black is the lowernumbered car. Fuel handling rules... CW: After the Williams fire [Spanish Grand Prix 2012] we held discussions with the teams and came up with a set of procedures we felt they should follow. These were standard practices such as earthing the containers, having a member of personnel with an extinguisher standing by, flame-proof overalls, operating the pump with a dead-man switch etc. We have now put those procedures into the regulations. Technical progress with the regulation of 2014 engines... CW: We’re having lots of meetings within the unofficial powertrain working group, which is composed of the engine suppliers. We have lots of meetings with those suppliers and the ideas that emerge go before the Technical Working Group.