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After Romain Grosjean survived a horrifying crash at the Bahrain Grand Prix, former Formula 1 boss Max Mosley tells 5 Live Drive's Tony Livesey big accidents lead to research that bring progress for safety.

Grosjean hit the barrier at 137mph and the impact measured a force of 53G. He was in an inferno for nearly 30 seconds before extracting himself and then being helped over the barrier by FIA doctor Ian Roberts, who had just arrived in the medical car, run towards the flames, and helped a marshal set off a fire extinguisher before going to the driver's aid.