"Significant risk must be shown in relation to two matters: first, the commission of further specified, but not necessarily serious, offences; and, secondly, the causing thereby of serious harm to members of the public."
"(2) If -- (a) the offence is one in respect of which the offender would apart from this section be liable to imprisonment for life, and (b) the court considers that the seriousness of the offence, or of the offence and one or more offences associated with it, is such as to justify the imposition of a sentence of imprisonment for life the Court must impose a sentence of imprisonment for life. (3) In a case not falling within subsection (2) the Court must impose a sentence of imprisonment for public protection."
"It is not clear whether Parliament, when referring in sections 225(2)(b) and 226(2)(c) to the seriousness of an offence or offences being 'such as to justify' imprisonment or detention for life, thereby making such a sentence mandatory, was intending to adopt this Court's criteria for the imposition of a discretionary life sentence (see R v Chapman[2000] 2 Cr App R(S) 77 ) or was seeking to introduce a new, more restrictive criterion for seriousness relating it solely to the offence rather than, also, to the dangerousness of the offender On the basis that Parliament is presumed to know the law, we incline to the former view. This construction is supported by section 143(1) which requires the court, when considering the seriousness of any offence, to consider the offender's culpability and 'any harm which the offence caused, was intended to cause or might foreseeably have caused'. This language clearly requires consideration of the culpability of the defendant as well as the seriousness of the offence and therefore involves consideration of dangerousness."