YouTube/Automotive TV: The Williams F1 test team plays a vital role in gathering information that will have a direct effect on how the Team performs at the World Championships. Tests include straight line running, driving performance checks, and data collection for analysis by the aerodynamics and engineering departments. Available material includes a behind the scenes edited package of a Williams F1 test day at Kemble air field, United Kingdom.

http://www.videosift.com/video/Williams-F1-Test-Team-Part-1 (part 1)