The National Vigilance Association (NVA) was a British society established in 1885.
It has been described as the main social purity organization in the United Kingdom.
[1] The National Vigilance Association (NVA) was established August 1885 "for the enforcement and improvement of the laws for the repression of criminal vice and public immorality".
[2][3][4] The Association was established in response to articles exposing child prostitution published by W. T. Stead in the Pall Mall Gazette.
[5] It was founded to support the 1885 Criminal Amendment Act and enforce it by combating prostitution, rape and the abduction and kidnapping of women and girls for prostitution, and to protect women in risk of sexual exploitation.