 By using the smaller C2 class only, the series was able to encourage more teams to enter not only due to the relatively low cost of the available cars, but also due to the lack of major automobile manufacturers to drive away competitors due to their dominance.This was also aided by the fact that there were already several British teams running C2 class cars on the international circuit.Although only seven cars would attend the opening race at Silverstone Circuit, the series was able to expand to sixteen competitors by the end of its first year.