Glenn joined the Legends Cars Championship in 2003, initially sharing a car with Robin Webb.

He's the 2002-3 Buckmore Park
Pro-Kart Grand Prix Winter Champion.

Glenn came 2nd in the Legends 2006 Winter Championship.

He became the first Englishman to be crowned World Semi-Pro Legends title when he raced at Sears Point in November 2007.

Glenn also finished 2nd in the Semi-Pro World Championship for 2007, and won the Transatlantic trophy with Robin Webb, Peter Morton and the rest of the european drivers.