“…The lack of knowledge about women's NPS use in prisons is not surprising and it reflects wider knowledge gaps about women and drugs more generally. There is now a considerable amount of research highlighting the ways framing in policies contributes to this underrepresentation (Moore et al, 2015;Wincup, 2016Wincup, , 2019Thomas and Bull, 2018;Brown and Wincup, 2020). Furthermore, women in the criminal justice system occupy a minority status and thus drug interventions have often not considered the specific treatment needs of incarcerated women sufficiently (Fazel et al, 2006;Corston, 2007;Simpson and McNulty, 2008;Fazel, Yoon and Hayes, 2017;Grace, 2017;Ministry of Justice, 2018).…”