[4] She represented England and won a silver medal in the 80 metres hurdles at the 1958 British Empire and Commonwealth Games in Cardiff, Wales.

[5][6] In the final, Quinton and winner Norma Thrower finished in a wind assisted 10.7 seconds in the final, faster than the previous Games record, though due to the wind assistance, it was not classified as a Games record time.

[7] In the same year, she was in the British team that came second in the 4 × 100 metres relay event at the 1958 European Athletics Championships.

[8] In 1959, she competed in a Great Britain vs West Germany athletics meeting in White City, London.

[1] She also competed in the 4 × 100 metres relay alongside Dorothy Hyman, Jenny Smart and Mary Rand.