Modifications were made to the bodywork and gearchange for the subsequent 1949 and 1950 GP2 and GP3 vehicles, GP3 also gaining a two-stage supercharger. Once again they were built to order, and supplied to Geoffrey Crossley and Joe Kelly respectively. Crossley took GP2 to the 1949 Belgian Grand Prix, but could only manage seventh place. In 1950 he set a number of speed records over 50 miles, 50 km and 100 km at the Montlhéry circuit. Kelly concentrated mostly on Irish races, and his best finish was third in the 1952 Ulster Trophy. Both drivers took their respective chassis to the 1950 British Grand Prix, the first ever Formula One World Championship race. However, while Kelly finished, he was unclassified; Crossley retired with a transmission fault.