Like Gill I am drawn to sprinting as it allows me to drive on the track without worrying about other cars. It is a test of the driver against the limits of the track. I am not sure if much benefit will be obtained by having a 10 minute track day session looking out for other cars, not to mention the risk of collision and holding up other drivers. This has been done to try and reduce the time for practice but I am not convinced it will save much time. With a field of nearly 100 they are presumably going to have at least 6 groups. If each group has 10 minutes track time that equates to one hour but there will be gaps when cars are leaving and joining the track and additional time will be needed for breakdowns and offs, not to mention the risk of collisions. I would expect it to take at least one and a half hours and possibly longer. I was at Goodwood last weekend and, with a field of 100 competitors, we completed the practice and the first timed run before lunch and then had two more timed runs after lunch to finish around 3.30. Perhaps the double lap approach used by Goodwood would give similar time saving. This does gives one timed lap and reduces the overall time.