"In our judgment, the learned Recorder, whilst adopting a thoughtful and careful approach to what was a difficult sentencing exercise, was nevertheless wrong to refuse to take into account the previous custodial sentence simply on the basis of the gravity of the instant offences (see her sentencing remarks cited at paragraph 13 above). We cannot see that this is a proper basis upon which so to refuse. Faced with a situation such as this, the judge sentencing in respect of the new offences, should consider all the circumstances in deciding what, if any, impact the previous sentence should have on the new sentence to be passed. Thus, we endorse the nuanced approach of Simon J in Cosburn's case. Without laying down an exhaustive list, those circumstances may include: ◦ how recently the previous sentence was imposed; ◦ the similarity of the previous offences to the instant offences: in this regard, we would remark that it will usually be helpful to obtain as much information as possible about the previous offences; ◦ whether the offences overlap in terms of the time they were committed; ◦ whether on the previous occasion the offender could realistically have 'cleaned the slate' by bringing the further offences to the attention of the police and asking them to be taken into consideration (we can envisage cases of historical sex abuse against multiple victims many years previously where the offender might genuinely have forgotten some of his offending and have made a genuine but in fact incomplete effort to clean the slate); ◦ whether to take the previous sentence into account would, on the facts of the case, give the offender 'an undeserved, uncovenanted bonus which would be contrary to the public interest' as referred to by Treacy LJ in McLean: this will particularly be the case where a technical rule of sentencing has been avoided or where, for example, the court has been denied the opportunity to consider totality in terms of dangerousness; ◦ the age and health of the offender, particularly if the latter has deteriorated significantly as a result of his incarceration and any other relevant circumstances including, for example, his conduct whilst in prison; and ◦ whether, if no account is taken of the previous sentence, the length of the two sentences is such that, had they been passed together to be served consecutively, that would have offended the totality principle. Having considered such matters and any others relevant to the instant case, the judge, having reached the appropriate sentence for the instant offences (taking into account the totality principle in respect of the new offences alone), then has a discretion whether or not he or she should make some further allowance or reduction to take account of the previous sentence. As stated by Simon J the end result may well be the appropriate sentence for the instant offence(s) without any further reduction being necessary or desirable."