In 1921 she was appointed a magistrate, one of the first women magistrates in Britain. In 1922 she was appointed education advisor to Holloway Prison (a prison for women in London). Margery Fry was Director of the Howard League for Penal Reform from its foundation in 1921 until 1926.
Margery Fry's appointment as a magistrate in 1921 was a significant milestone, making her one of Britain's first female magistrates. Her subsequent role as education advisor at Holloway Prison in London in 1922 further highlighted her contributions. Fry served as Director of the Howard League for Penal Reform from its inception in 1921 until her departure in 1926.