Works team
A test car was constructed, tested and modified after which three team cars were assembled at the Sunbeam Wolverhapmpton Experimental Department. For the purpose of the Grand Prix the three Works team cars were designated Sunbeam I, II and III for Jean Chassagne (riding mechanic Robert Laly), Major H.O.D. Segrave (riding mechanic Jules Moriceau), K. Lee Guinness (riding mechanic Bill Perkins) respectively. The test car became the Strasbourg spare car and was used in practice by all three team members; "Guinness, Chassagne and myself [Segrave] put any amount of time on the course".