Kolawole Erunkulu, 45, spent 53 hours driving in the three days leading up to the fatal crash and took a maximum break of seven hours - building up a "sleep debt"

Kolawole Erunkulu (pictured) was driving along the A23 in Merstham, Surrey, when he veered off the road and struck Philip Dray.

Kolawole Erunkulu, 45, spent 53 hours driving in the three days leading up to the fatal crash and took a maximum break of seven hours - building up a "sleep debt"