"35. In other jurisdictions, those who have entered into consent orders may set them aside on very narrow grounds. We do not exclude the possibility in the arena of confiscation orders that such circumstances might conceivably arise. But we do not consider that they arise where the essence of the complaint is that, in seeking to secure the best deal available, erroneous advice was given to one of those who was party to the agreement, save in the most exceptional circumstances. We would not wish to identify exhaustively what those circumstances might be but, in our judgment, there would need to be a well-founded submission that the whole process was unfair. We do not consider that the circumstances of this case come close to that. 36. We see no warrant for reading over generally the approach that has developed in appeals against conviction based upon erroneous advice into confiscation proceedings. There is a fundamental difference between sentence and conviction. On an appeal against conviction, where it is suggested that erroneous legal advice resulted in a guilty plea, the court may allow the appeal and then a trial will take place. The defendant will be either acquitted or convicted and, if convicted, he will be given an appropriate sentence. On a successful appeal against sentence, the matter is not sent back to the court with the issue, as it were, at large. This court can vary a sentence but it cannot increase it. So if Mr Ashley-Norman were correct, an appellant in Mr Hirani's position could appeal to this court, having agreed the confiscation order on a false basis, and seek to set it aside, but in doing so he would deny the prosecution the possibility of contending for a higher figure. In other words, the prosecution would in effect be bound by the agreement from which the appellant, on this hypothesis, had been released. That would, in our judgment, be an undesirable -- not to say extremely odd -- result."