MG cars are equipped with radios to help them plan their tactics during a race at Brooklands.
Full title reads: "Brooklands. Radio at 100 MPH! M.G. Team receive instructions by wireless whilst racing - for the first time - in Light Car Relay Race - and win easily."
Various shots of racing cars setting off from the start. One of the cars is driven by the Earl of March.
Various shots of cars speeding around Brooklands banked track.
Shot of radio operator speaking to the driver of car 19A.
MS of car 19A driving at speed.
Shot of cars in the pits for relay change over. The second driver of the radio equipped team climbs into his car.
More shots of racing.
The final driver of the team pulls his car in and lines it up with those of his team mates. He gives a short interview to the cameras.
N.B. MG stands for Morris Garages.