Where a sentencing judge gives discounts for a plea of guilty and for past and future assistance to authorities, the judge should indicate the discount for all three separately. If the combined discounts would produce an unreasonably disproportionate sentence under s 23(3), the individual discounts must be reduced before final determination rather than stated at one level and then compressed to a lower combined figure. The long-standing principle from R v Sukkar that combined discounts for plea and assistance should very exceptionally, if at all, exceed 40% (absent evidence of harsher custodial conditions) was affirmed and applied.
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