His father, Willie Harrison, was a popular Formula 1 Stock Car racing driver.

Harrison began to follow in his father’s footsteps when he raced competitively for the first time in 1977 in a Ministox, at the age of 8.

The promoter allowed Harrison to race despite being aware that he was below the minimum age requirement.

Harrison attained the red roof of a star grade driver in 1988, and in 1989 he won his first meeting final at Owlerton Stadium in Sheffield.

More success followed when Harrison won the European Championship at Northampton International Raceway in both 1998 and 2003.