For young people who commit grave crimes - they can be sentenced by the courts to be detained in custody under Section 91 Powers of Criminal Courts (Sentencing) Act 2000.                         

These cases are dealt with in Crown Courts and the young person would need to be convicted of:

• An offence punishable in the case of an adult with 14 years or more imprisonment
  
• Indecent assault as a man or women
  
• Causing death by dangerous driving

In addition, the same criteria apply as to a custodial sentence regarding protection of the public.