In the Scrappy Races series, five teams - The Barley Pickers, The Megalomaniacs, Chaos Crew, Boat Buoys and The Green Goddesses - build road-legal vehicles capable of being adapted to take on a different challange each week. The first episode follows the teams on their initial build, leading up to the vehicles being put through the government roadworthiness examination and then a spin round the Scrappy Races test circuit.

The teams travel to South Wales for their first proper challenge. They have eight hours on a local scrapheap to adapt their vehicles before taking them out for speed trials on the Pendine Sands, home to attempts on the World Land Speed Record since the 1920s.

The Scrappy Races motorcade travels to Tong in Yorkshire, where the teams adapt their vehicles to take on a torturous all-terrain course.

The final leg of the Scrappy Races tour takes the teams to the banks of Loch Lomond where they must adapt their vehicles for a race on water.