Reproducibility archive for Treatment access and completion in England's highest-need drug treatment systems through the COVID-19 pandemic and a need-weighted funding expansion, 2009/10–2024/25

Analysis materials for the exploratory, non-preregistered study of treatment access and successful completion across 141 English local authorities, 2009/10–2024/25. The archive contains a derived authority-year panel, a substance-specific derived panel, the frozen comparison lock, machine-readable result tables, analysis and verification code, final table and figure generators, documentation, and SHA-256 file manifest. The source-level NDTMS extract is not redistributed because its exact access route and redistribution status are not documented; source and licence notes give its hash and retrieval context. The archive contains analysis materials and no manuscript. It does not identify a causal effect of funding. Authors: Sergey Alexeev and Thomas Mason. Third-party source statistics retain their own rights; the included notes attribute their sources.