This is a documentary on the human cost of those pre-regulation years "Grand Prix: The Killer Years": http://www.bbc.co.uk/programmes/b00z8v18 http://www.bbc.co

This is a documentary on the human cost of those pre-regulation years "Grand Prix: The Killer Years": http://www.bbc.co.uk/programmes/b00z8v18 http://www.bbc.co.uk/programmes/b00z8v18 Unfortunately the content doesn't really go into much detail on how things changed but focuses more on the events leading to the changes. I'm not a motor racing enthusiast but still found it interesting viewing.