Smith entered her first rally as a co-driver. After deciding that navigating was not to her liking, she switched to driving. She came to the attention of the Rootes Group's Competition Department, which offered her a works drive.
Smith was controversially disqualified from the 1966 Monte Carlo Rally after winning the Coupe des Dames, the ladies' class. Ten cars in total were disqualified. "Rosemary Smith said she would never compete again unless the decision were reversed."
Her other competition successes included an outright win in the 1969 Cork 20 Rally. Smith has won the ladies' prize several times on the Scottish Rally and on the Circuit of Ireland Rally, twice each on the Alpine Rally and on the Canadian Shell 4000 and once on the Acropolis Rally. She also has numerous class wins to her name.
In 1966, Smith appeared as a guest on an episode of What's My Line. Arlene Francis, Mark Goodson, Ginger Rogers, and Bennett Cerf were on the panel and successfully guessed her "line" as a racecar driver.
- Motor Sport, May 1964, Page 373.
- Motor Sport, June 1965, pp. 471-72.
- Competition Press & Autoweek, 12 February 1966, pp. 1, 6.
- What's My Line?, retrieved 19 September 2018
- Renault UK, 79 year-old Rosemary Smith takes The Ultimate Test Drive, retrieved 13 July 2017
- Mowat-Brown, G. (2003). "Imp : The Complete Story". The Crowood Press.
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