Williams: We had an issue that curtailed a lot of our running

Williams report from the fourth and final day of the first Formula 1 preseason test held at Circuit de Barcelona-Catalunya.

Rod Nelson, Chief Test & Support Engineer: "Thursday was one of those days I’m afraid. We spent most of the morning doing aerodynamic correlation work which was pretty successful. We are getting through our programme day by day. Sadly, we had an issue with one of the car systems over lunchtime and that curtailed a lot of our running this afternoon which we had planned. We know what the issue is, we’ve got a solution, and now we look forward to next week."

Felipe Massa: "I am not so happy with today - it was not really a useful day. The most important things was that we carried out our aerodynamic tests this morning, to understand the numbers and everything around the car. Unfortunately, we couldn’t run much this afternoon. I had hoped to do more laps than I did."