"4. Faced with that background the courts have no alternative but to adopt a robust sentencing policy towards those who commit these offences. Those who do so must understand that they will be punished severely. Custodial sentences will be the only option available to the courts when these offences are committed, unless there are exceptional circumstances. That will apply irrespective of the age of the offender and irrespective of whether the offender has previous convictions. However, both those factors are very important when a judge comes to decide on the length of sentence. 5. In his submissions on behalf of the Attorney General, Mr Pownall said that the bracket of sentencing which the authorities reveal for offenders of the sort we have been describing is 18 months to five years. We will look shortly at the some of the authorities to which we were referred. We agree with what Mr Pownall said, subject to this. If the offences are committed by an offender who has a number of previous convictions and if there is a substantial degree of violence, or if there is a particularly large number of offences committed, the five year upper limit may not be appropriate."