Thomas Johnson, 19, had admitted to taking nitrous oxide through balloons while driving and exceeding speeds of more than 100mph on a road with a speed limit of 30mph Daniel Hancock, 18, Ethan Goddard, 18, and Elliot Pullen, 17, died in the crash in Marcham, Oxfordshire, in June last year.
Mobile phone video footage taken inside the car moments before it crashed showed the boys laughing and passing nitrous oxide canisters to the front while Johnson had a balloon to his face.
