Her Majesty's Young Offender Institution
) is a type of British prison
intended for offenders aged between 18 and 21. There are as of 2005
14 dedicated institutions: In 2007 young offender institutions will be abolished with those over 18 sent to adult prisons.
and 20 which share their site with other penal establishments:
See Young Offender Institution, Her Majesty's Prison Service