Hi. When I was a kid, Saturday afternoons had a sports programme called Grandstand. They regularly featured a kind of car racing that was on both tarmac track and dirt. There were Minis, escorts, Cortinas, Vivas and even exotica like Porsches and Mustangs. My favourites were the Ford Galaxie 500s. I am sure this wasn’t called saloon car racing because that was all on proper track surfaces. Motocross was motorcycles. What was it called?