 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 