Although competitive before the war, Walker's aggressive style and experience helped him become even more successful. In fact, he was one of handful of driver who could get the ERA E-type to perform. In 1948, he was able to put together some impressive performances both in hillclimbing, but in Grand Prix Racing. One of those races was the inaugural
British Grand Prix, at
RAF Silverstone. However, the race did not go to plan. He entered the race driving an ERA E-type, but the manufacturer was unable to deliver the chassis in time, so Walker used his older B-type. During the race, he survived the massive attrition to finish in 11th place, 12 laps adrift of the winner,
Luigi Villoresi.
Sports Car Ace Walker performances of the hills brought him to the attention of
Lofty England, the manager of
Jaguar's sports car racing team, rewarded him with a drive in a
Jaguar XK120 in this newly launched car's first race at Silverstone in 1949. Walker finished second, but won at same event 12 months later, in an alloy-bodied works-prepared XK120. Still nursing his burns from the British Grand Prix, Walker dismissed them as little more than "a bit of a nuisance", he arrived at
Dundrod to race a C-Type in the
RAC Tourist Trophy. Jaguar cleaned up, taking all three places in the podium. As for Walker, he finished in a dutiful second behind Moss. Walker did test and race again in 1957. In the spring, he tested for
Rob Walker Racing Team, in their Connaught Type B at Goodwood, and subsequently drove the car in a one-off race, the
Gran Premio di Siracusa the following season. He was classified in eighth place despite spinning and stalling the car late on. ==Away from the track==