Horner's career in motorsport started after winning a Formula Renault scholarship in 1991, he competed in the 1992 British Formula Renault Championship with Manor Motorsport, finishing that season as a race winner and the highest placed rookie.
Horner's career in motorsport started after winning a Formula Renault scholarship in 1991, he competed in the 1992 British Formula Renault Championship with Manor Motorsport. Horner's career in motorsport started after winning a Formula Renault scholarship in 1991, he was finishing that season as a race winner. Horner's career in motorsport started after winning a Formula Renault scholarship in 1991, he was finishing that season as the highest placed rookie.