A month later his victory at Circuit de la Sarthe, he finished seventh in the RAC British Grand Prix in a supercharged 1.5-litre V16 BRM Type 15, with his teammate Reg Parnell in fifth. Both drivers legs were so badly burnt by heat from the engines and exhaust systems that even walking was painful. Gregor Grant reported: "Parnell and Walker saved the day for British motor racing. Their heroism in sticking to their task whilst suffering from agonising burns will enable the BRM designers to go ahead and modify the cars to make them completely raceworthy." Sadly, Walker did not race the BRM again.