Where a co-offender's sentence for a co-ordinate offence has been entirely subsumed within a much longer concurrent sentence for a more serious offence of different character, it is artificial to extrapolate the sentence for the co-ordinate offence as a yardstick for parity comparison. The parity principle requires a sufficient basis for genuine comparison, which is absent where the co-offender's sentence was designed to comprehend the totality of criminality across multiple offences of different gravity.
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