== Non-champ F1 events == 

 The stub lists participation in several non-championship F1 races. I can find confirmation of three: 1967 Spanish GP, retired after one lap; 1969 Madrid GP, (in an F5000) retired, 0 laps; 1971 BRDC International Trophy, retired (F5000); 1971 Jochen Rindt Gedächtnisrennen, 12th. The article's only cited reference is from RL himself. Can anyone come up with cites that can be added (or substituted) for his participation in any or all of the events listed?