A survey of community drug team prescribing policies and client views.
Luty J., O'Gara C., Sessay M. et al. Journal of Substance Use: 2010, 15(1), p. 51–59.

Contrary to national guidelines, in the mid-2000s in England and Wales, prescribed doses of the heroin substitute methadone were generally low, and often even new patients were not required to take it under supervision at the pharmacy. Patients in Essex also generally favoured low doses and opposed supervised consumption.

Summary:
Based on data from the mid-2000s, this report relates the findings of a survey of usual prescribing practices at NHS community drug teams in England and Wales (which treat addiction to drugs including heroin) to a companion survey of the opinions on these policies of patients from one area.