F2young offenders centres, that is to say, places—

1. i

   in which offenders, who have been ordered to be detained therein under any enactment, may be kept for suitable training and instruction; and

2. ii

   in which persons not less thanF3 fifteen but under 21 years of age who are either remanded in custody or committed in custody for trial may be detained in accordance with any enactment.

remand centres, that is to say, places—

1. i

   for the detention of persons not less thanF3 fifteen but under twenty-one years of age who are either remanded or committed in custody for trial; and

2. ii

   for the detention for any temporary purpose, or for the purpose of providing maintenance, domestic and other services for that centre, of any persons required to be detained in an institution to which the Prison Act applies; and

facilities in remand centres for the observation of any person detained therein on whose physical or mental condition a medical report may be desirable for the assistance of the court in determining the most suitable method of dealing with his case;