The detention of offenders aged 18, 19, and 20, under s 96 of the Powers of Criminal Courts (Sentencing) Act 2000, in a young offender institution. For those under that age, it has been replaced by a detention and training order. The term of detention may never exceed the maximum term of imprisonment that could be imposed for the offence in the case of an offender aged 21 or over. The minimum is 21 days. See also detention and training order; juvenile offender; long‐term detention.