The most important motorsport company you've never heard of (part 1)

Motorsport is about more than the teams and drivers you see on track, with several companies carrying out key work away from the limelight and becoming trusted key partners to the best teams around the world. Jake Boxall-Legge pays a visit to AVL Racing to find out how its mantra of Simulate - Engineer - Make - Test - Race is making a difference in racing.