 Complete the following phrase:  While he signed with BRM alongside Graham Hill in 1965, a contract which netted him 4,000, his first race in an F1 car was for Lotus, as stand-in for an injured Jim Clark, at the non-championship Rand Grand Prix in December 1964; after qualifying in pole position the Lotus broke in the first heat, but he won the second and claimed fastest lap. On his World Championship F1 debut in South Africa, he finished sixth. His first major competition victory came in the BRDC International Trophy in the late spring, and before the end of the year he won his first World Championship race at 