The numbers of young adults in custody has been falling in recent years.
Under the current legal framework, young adults cannot be sentenced to imprisonment or committed to prison for any reason (subject to a few exceptions). Instead the vast majority of young adults are held in Young Offender Institutions (YOIs). These are either single use YOIs or establishments that have a dual designation (designated both as a prison and a YOI).
The following list identifies the dual-designated establishments that hold young adults (aged 18-20 years old) and adults (aged 21 and over). We do not set the number of places available for young adults in dual designated institutions
Prisons holding young adults and adults in July 2014