She was an active member of the Women's Liberal Association, and later of the
Women's Liberal Federation, and was head of the order's Marylebone branch. An active philanthropist, Sandhurst ran her own home for sick children in the Marylebone Road. In January 1889, Lady Sandhurst was elected to the London County Council at the head of the poll. However, because she was a woman, one of the defeated candidates, the Conservative Beresford Hope, petitioned against her election, and both the Court of Queen's Bench and the Court of Appeal ruled against her. In recognition of her sympathy towards Ireland, in September 1889, Sandhurst was awarded the
Freedom of the City of Dublin. That same year, she was also a council member of the
Women's Franchise League, and supported the formation of the Women's Trade Union Association. From 1889, she was also a member of the executive committee of the Central National Society for Women's Suffrage. In 1890, she was elected president of the Society for Promoting the Return of Women as County Councillors, later (1893) renamed the
Women's Local Government Society. ==Later life==