“There never has been, and never will be, much enthusiasm about a process by which criminals receive lower sentences than they otherwise deserve because they have informed on or given evidence against those who participated in the same or linked crimes, or in relation to crimes in which they had no personal involvement, but about which they have provided useful information to the investigating authorities. However, like the process which provides for a reduced sentence following a guilty plea, this is a longstanding and entirely pragmatic convention. The stark reality is that without it major criminals who should be convicted and sentenced for offences of the utmost seriousness might, and in many cases, certainly would escape justice. Moreover, the very existence of this process, and the risk that an individual for his own selfish motives may provide incriminating evidence, provides something of a check against the belief, deliberately fostered to increase their power, that gangs of criminals, and in particular the leaders of such gangs, are untouchable and beyond the reach of justice. The greatest disincentive to the provision of assistance to the authorities is an understandable fear of consequent reprisals. Those who do assist the prosecution are liable to violent ill-treatment by fellow prisoners generally, but quite apart from the inevitable pressures on them while they are serving their sentences, the stark reality is that those who betray major criminals face torture and execution. The solitary incentive to encourage co-operation is provided by a reduced sentence, and the common law, and now statute, have accepted that this is a price worth paying to achieve the overwhelming and recurring public interest that major criminals, in particular, should be caught and prosecuted to conviction.”
“73. Assistance by defendant: reduction in sentence (1) This section applies if a defendant - (a) following a plea of guilty is either convicted of an offence in proceedings in the Crown Court or is committed to the Crown Court for sentence, and (b) has, pursuant to a written agreement made with a specified prosecutor, assisted or offered to assist the investigator or prosecutor in relation to that or any other offence. (2) In determining what sentence to pass on the defendant the court may take into account the extent and nature of the assistance given or offered.
“74. Assistance by defendant: review of sentence (1) This section applies if - (a) the Crown Court has passed a sentence on a person in respect of an offence, and (b) the person falls within subsection (2). (2) A person falls within this subsection if - (a) he receives a discounted sentence in consequence of his having offered in pursuance of a written agreement to give assistance to the prosecutor or investigator of an offence but he knowingly fails to any extent to give assistance in accordance with the agreement … (3) A specified prosecutor may at any time refer the case back to the court by which the sentence was passed if - (a) the person is still serving his sentence, and (b) the specified prosecutor thinks it is in the interests of justice to do so. (4) A case so referred must, if possible, be heard by the judge who passed the sentence to which the referral relates. (5) If the court is satisfied that a person who falls within subsection (2)(a) knowingly failed to give the assistance it may substitute for the sentence to which the referral relates such greater sentence (not exceeding that which it would have passed but for the agreement to give assistance) as it thinks appropriate …”
“… the issue of lies was only one of several issues that impacted negatively upon the credibility of [David Stewart]. Further issues, all of which were significant, included his previous bad character, his abuse of alcohol and drugs, the possibility of contamination, his difficulties with memory, and his tendency to confuse incidents and the details of those participating in them. In these circumstances, I do not consider it possible to conclude that the breaches per se were in any way determinative of the outcome of the trial.”
“At para 33 the court indicated that a review under section 74 is a fresh process which takes place in new circumstances. We consider that this analysis is helpful in understanding how the prosecutor should approach the interests of justice test in section 74(3)(b) of the 2005 Act. If the prosecutor concludes that the failure to give assistance is such that the court could not conclude that the circumstances had altered as a result, the interests of justice would rarely require referral. If, as is generally likely to be the case where there has been a failure or refusal to provide assistance, the court could take the view that the circumstances had changed the interests of justice would point towards a referral unless there were countervailing considerations. It is with those principles in mind that we examine the approach of the prosecutor in this case.”
“33. P’s appeal raises a specific question relating to the involvement of this court. The original 17-year sentence was reduced to 15 years when this court exercised its powers undersection 9 of the Criminal Appeal Act 1968 . The jurisdiction to conduct a review of sentence on the basis of post-sentence assistance is vested in the Crown Court. Its decision on the review is subject to appeal to this court. Therefore, the review itself is not an appeal against sentence, whether imposed in the Crown Court or this Court. It is a fresh process which takes place in new circumstances. Accordingly, the process of review is not inhibited by the fact that this court has already heard and decided an appeal against the original sentence, whether the sentence is varied on appeal or not. This Court may be required to address either a sentence imposed in the light of the written section 73 agreement, or a review conducted in accordance with section 74, or, as here in the case of P, where the assistance provided may impinge on both decisions.”