BBC Website report.
The Prison Officers’ Association (POA) has written to the chief coroner for England and Wales asking him to investigate the link between prisoner deaths and so-called legal highs.
In a letter shown exclusively to the BBC, the union said the drugs have led to a “stark increase” in deaths.
It also linked them to violence and prison officer assaults and also called for improved drug tests.
The Prison Service said it took a zero tolerance approach to drugs in prisons.
A report by the Prisons and Probation Ombudsman (PPO), published in July, found legal highs were a factor in at least 19 prisoner deaths nationwide between 2012 and 2014.