His eldest son Justin Bell is also a racer. The two raced together in the 1991 24 Hours of Daytona, and the 1992 24 Hours of Le Mans. Bell was to race in the 2008 24 Hours of Daytona with Justin, however the car dropped out of the race early and Derek did not get to run in the race. Aside from winning at Le Mans five times, he claims his proudest moment was coming third with his son Justin racing the Harrods sponsored McLaren F1 GTR in the 1995 Le Mans on Fathers Day.