“A defendant being sentenced for offences committed both before and after April 4 is required to be sentenced by reference to the two different regimes. It will generally be preferable to pass sentence on the later offences by reference to the new regime, imposing no separate penalty for the earlier offences. But this may not be possible if the later offences are less serious than the earlier ones”
“…even a cursory glance.. makes it plain that the sentence is concerned with future risk and public protection. Although punitive in effect, with far reaching consequences for the offender on whom it is imposed, strictly speaking, it does not represent punishment for past offending…when the information before the court is evaluated, for the purposes of this sentence, the decision is directed not to the past, but to the future, and the future protection of the public.”