He competed in Formula One in 1962, participating in 3 World Championship Grands Prix, and several non-Championship races.

[1] Shelly made his motor racing debut in January 1955, entering a Morgan in the Sports Car class for the New Zealand Grand Prix.

[3] He drove mainly for John Dalton, usually in non-championship events with moderate success, a fifth in the Lombank Trophy and a third in the Lavant Cup being the highlights of his season.

[3] At the end of the season he returned to New Zealand where he continued to race in 1963 and 1964 following which he retired, although he did compete occasionally thereafter.

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