It had been intended to début the car at the 1950 Formula One Grand Prix race at Silverstone, the first race of the new Formula One World Championship, but problems with the engine, such as cylinders cracking, buckling of connecting rods, and piston failures, led to the postponement of the race début. BRM instead had to settle for displaying the car at Silverstone after the BRM mechanics had worked all the previous night to get the car ready. Mays drove the car for several laps. The demonstration was witnessed by Princess Elizabeth, later Elizabeth II, and her husband, Prince Philip, Duke of Edinburgh.