This section applies where an offender is committed by a magistrates' court for sentence under—
section 16(2) (committal for sentence of young offenders on summary trial of certain serious offences),
section 16A(2) (committal for sentence of young offenders on summary trial of certain ... offences),
section 17(2) (committal for sentence of dangerous young offenders), or
section 19(1) (committal for sentence on indication of guilty plea by child or young person with related offences).
Subsection (5) applies where a magistrates' court—
commits an offender under section 19(1) to be dealt with in respect of an offence (“the offence”), but
does not make a statement under section 19(3) (statement of power to commit under section 16(2) , 16A(2) or 17(2)).
Unless the offender is convicted before the Crown Court of at least one of the offences for which the magistrates' court has sent the offender for trial (see section 19(1)(a))—
subsection (2)(b) does not apply, and
the Crown Court may deal with the offender for the offence in any way in which the magistrates' court could have dealt with the offender for it.