Last updated: 16 January 2026
Compact-Based Drug Testing (CBDT)
Where offenders sign a compact to remain drug free and testing is carried out to measure their compliance, often linked to incentives.
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Compact-Based Drug Testing (CBDT)
MDT (Mandatory Drug Testing)
Mandatory Drug Testing - a programme of random and suspicion-based drug testing in prisons. A positive test is a disciplinary offence and may affect a prisoner's privileges and release decisions.