The protégé of the successful Swiss trainers Arnold and Jacques Gerschwiler from Richmond first took part in British championships in 1944 at the age of 9 years and 263 days, making him the youngest participant in the history of the British figure skating championships. Osborn also competed in 1947 and 1948, and in 1949 also at the European and World Championships , where she finished ninth and twelfth respectively. In the following years it moved up in the results lists. As early as 1950, when competing for the Richmond Trophy , the British senior title, Osborn was considered one of the leading British figure skaters, along with Jeannette Altwegg and Barbara Wyatt . A year later at the European Championships, where she finished fourth, the young British woman was counted among the best European women with Altwegg, French Jacqueline du Bief and Wyatt , who were placed in front of her .
In January 1952 Osborn took part in the Swiss Oetzen Cup in Davos together with other international ice skating stars such as the Australians Gweneth Molony and A. Swan , finished 11th at the Olympic Winter Games in Oslo in Oslo in 1952 and won the British championship in March of the same year Absence of the resigned Jeannette Altwegg and a shapeless Barbara Wyatt. Osborn only reached the peak of her career in 1953 when she fought a “big fight” for the vacant European ice skating crown with the German champion Gundi Busch in Dortmund . After a very good compulsory program, Osborn fell in the freestyle in the double toe loop , but benefited from Busch's four falls and won the European title in the women's competition. In the same year, the British achieved her best placement at the World Championships and won bronze behind the Americans Tenley Albright and Gundi Busch.