In subsection (3) (determination of the appropriate part of the sentence) at the end insert—

“In Case A or Case B below, this subsection has effect subject to, and in accordance with, subsection (3C) below.”

After subsection (3) insert—

“(3A)

Case A is where the offender was aged 18 or over when he committed the offence and the court is of the opinion that the seriousness of the offence, or of the combination of the offence and one or more other offences associated with it,—

(a)

is exceptional (but not such that the court proposes to make an order under subsection (4) below), and

(b)

would not be adequately reflected by the period which the court would otherwise specify under subsection (2) above.

(3B)

Case B is where the court is of the opinion that the period which it would otherwise specify under subsection (2) above would have little or no effect on time spent in custody, taking into account all the circumstances of the particular offender.

(3C)

In Case A or Case B above, in deciding the effect which the comparison required by subsection (3)(c) above is to have on reducing the period which the court determines for the purposes of subsection (3)(a) (and before giving effect to subsection (3)(b) above), the court may, instead of reducing that period by one-half,—

(a)

in Case A above, reduce it by such lesser amount (including nil) as the court may consider appropriate according to the seriousness of the offence, or

(b)

in Case B above, reduce it by such lesser amount (but not by less than one-third) as the court may consider appropriate in the circumstances.”