Background: Prisons in Europe remain high-risk environments and conducive for infectious disease transmission, often related to injection drug use. Many infected people living in prison unaware of their infection status (HIV, hepatitis C). Despite all Council of Europe (CoE) member states providing community needle and syringe programmes (NSP), prison NSP are limited to seven countries. The study aim was to scrutinise the Committee for the Prevention of Torture and Inhuman or Degrading Treatment (CPT) reporting of periodic and ad hoc country mission visits to prisons, with an explicit focus on the extent to which member states are/were fulfilling obligations to protect prisoners from HIV/hepatitis C; and implementing prison NSP under the non-discriminatory equivalence of care principle. Study design: Socio-legal review. Methods: A systematic search of the CPT database was conducted in 2024 with no date restriction. All CPT reports were screened in chronological order with the terms; " Results: CPT reporting reveals limited prison NSP provision in selected prisons visited on mission, with little change in status over time, despite documented evidence of prior observations around absent/insufficient harm reduction measures and explicit (often longstanding) recommendations to address deficits. Reasons for not implementing prison NSP include; existing availability of opioid substitute treatment, lack of evidence for injecting drug use, for security and maintenance of order, and contradiction with prison protocols sanctioning drug use. Conclusions: Prison health is public health. Regular research and evaluations of prison NSP in Europe are warranted. Future CPT visits should also continue to assess availability and standards of provision; recommend where appropriate including when opioid substitute treatment is already provided, and in line with broad availability of community NSP in Europe.