British driver Harrison is making his single-seater debut with Valour in GB4, after a successful early career in sports car racing.
The 21-year-old is one of the leading Britcar contenders of the past two years, having dominated the series in a Praga in 2020 with five race wins from the nine races. He backed up that performance by finishing second in class last year, with five podium finishes at the wheel of a Nissan GT-R GT3 machine.
Harrison’s career has also seen him race Ford Fiestas, with multiple race wins at junior and senior level, and he was a podium finisher in the 2019 Ginetta GT5 Challenge.
He started karting at the age of eight, and climbed through the ranks to Super One and Formula Kart Stars, and became a lap record holder at Kimbolton.