Spearman didn't start playing golf until she was in her early 20s, and first came to prominence in 1953 when reached the fifth round of the English Women's Amateur Championship and the final of the Worplesdon Mixed Foursomes.

[2] In 1955 she won the Middlesex title for the first time and played for England in the Women's Home Internationals.

[3] She would win the Middlesex championship eight times between 1955 and 1965 and represented England in the home internationals each year in that period.

[4] In 1961 Spearman won the British Ladies Amateur beating Diane Robb 7&6 in the final.

[7] In 1964 she won the English Women's Amateur Championship beating Mary Everard 6&5 in the final, having beaten Bonallack in the semi-finals.

[23][24][25] She also played for England in the inaugural Espirito Santo Trophy contest in 1964, where the team finished in third place and Spearman was joint-third in the individual standings.