"It is in our judgment plain, as the Court has on occasion acknowledged, that there is an interrelationship between the gravity of the offence before the Court, the likelihood of further offending, and the gravity of further offending should such occur ... There is, however, in our judgment no ground for doubting the indispensability of the first condition laid down for imposition of an indeterminate life sentence in Hodgson, reaffirmed, as we say, in the more recent Attorney-General's Reference No 32 of 1996 (Whittaker). It moreover seems to this Court to be wrong in principle to water down that condition since a sentence of life imprisonment is now the most severe sentence that the Court can impose, and it is not in our judgment one which should ever be imposed unless the circumstances are such as to call for a severe sentence based on the offence which the offender has committed."