 Complete the following phrase:  After racing in the British F1 Championship in 1980 with a Williams FW07, and winning in Silverstone, he moved to Formula One in 1981, with March. He switched midseason to Ensign, and finished 6th in the Dutch Grand Prix. In 1982 he drove for ATS, and finished 5th in the San Marino Grand Prix, a race where only 7 teams entered due to the FISAFOCA war. His most noted career moment in Formula One came when he collided with the overtaking race leader Nelson Piquet in the 