The cars were of conventional construction for the time with drive through a preselector gearbox to a de Dion rear axle.

In 1952 and 1953, the Grand Prix races counting towards the World Championship were to Formula 2 rules so drivers of these cars could take part in those events as the table below shows.

The first cars were built with all-enveloping aerodynamic bodywork but later rebodied conventionally (as the photos below show).

[3] In 1962, Jack Fairman attempted to qualify for the Indianapolis 500 in a Connaught race car, but failed to find the necessary speed to make the field.

Prior to the single-seat racing cars they built a small number of road going sports cars developed on the Lea-Francis Sports Chassis, which achieved considerable competition success.