Uways Hussain and Usmon Mahmood inhaled nitrous oxide before the collision in which 50-year-old Sylvester Abayomi died

Uways Hussain, 20, and Usmon Mahmood, 23, have been jailed for causing the death of Sylvester Abayomi, 50, by dangerous driving after they sped at 139mph in a 30mph zone

Uways Hussain and Usmon Mahmood have been jailed following the fatal crash in March