“The Misuse of Drugs Act 1971” makes production, possession and supply of controlled drugs unlawful except in some specified circumstances such as when the drugs have been legally prescribed by a doctor or licenced prescriber.
An employer who knowingly permits the supply, possession or production of controlled drugs on their premises could also be prosecuted.
The “Management of Health and Safety at Work Regulations 1999” puts a legal duty on employers to assess the risk to the health and safety of their employees.
The “Health and Safety at Work Act 1974” places a duty on the employer to provide, so far as reasonably possible, the safety, health and welfare of employees.