 Complete the following phrase:  In addition to the official winners trophy, in 1950 the RAC also awarded for the first time a further perpetual trophy, the Fred G. Craner Memorial Car Trophy, for the highest-placed British competitor driving a British car, which was awarded until at least 1972. Fred Craner had been secretary of the Derby  District Motor Club and instrumental in establishing Donington Park as a motor racing circuit and in organising the Donington Grands Prix. The first winner of this trophy was Bob Gerard driving an ERA, who finished fifth overall. The first occasion on which the winners of the British Grand Prix also won the Fred G. Craner Memorial Trophy was at Aintree in 