“…if a right of appeal is claimed, then the Crown would naturally seek to rely on the provisions of section 58(3), (10) and (11) to prevent its appeal being ineffective. If an appeal is heard but dismissed, then it is for the court to acquit the defendant (section 61(3)). That leaves, however, the situation where the position is first frozen by reason of the intimation of an intention to appeal, but the appeal is not or cannot then be proceeded with. In that case, the Crown is put on terms that it will not seek to go behind the judge’s ruling, for instance by trying to argue that the ruling is not after all a terminating ruling. Where an acquittal is potentially of no effect, the defendant does need the protection of the Crown’s section 58(8) agreement and its notification to the judge.”
“…we are unable to see how these statutory provisions can be read as meaning anything other than that there is no right of appeal unless the undertaking is given to the court of trial at the time of the announcement of the intention to appeal. The Order, withs 58 of the Criminal Justice Act 2003 , represents a major departure from the former law. The Crown is given a right of appeal in relation to trial on indictment for the first time. Moreover, it is given a right of interlocutory appeal. The new right is given on strict terms. It may be that the new right could have been as effectively controlled if the statute and order had provided that whether or not an undertaking in the terms of article 4(8) was given in open court, any appeal was to be on terms that if leave were refused, or the appeal abandoned, or it failed in due course, acquittal should follow. Or it may be that alternative form of control would not be so effective. What is clear is that alternative form of control is not what has been enacted. The words 'may not….unless, at or before that time' must be given their effect. They require the giving of the undertaking in open court at the time of invocation of the right of appeal and they say that the prosecution "may not" inform the court it intends to appeal, unless this is done. The object is clearly to require the Crown to commit itself from the outset. Nor can we see any proper basis of construction under which what is in section 58(8) … can be read differently according to whether the ruling under challenge is ipso facto fatal to the prosecution or one in relation to which the Crown chooses to give the acquittal agreement. There would, moreover, be considerable scope for argument about which category some rulings fall into. On these grounds alone, we are unable to see that we have any jurisdiction to hear the appeal against either ruling. Prosecutors who wish to launch appeals against rulings must give the article …section 58(8) undertaking in open court at the time of invoking the right of appeal. We are not asked to consider whether it must be given in any particular form, and have not done so; it may well be that it can be given in shorthand or by reference to the statute; given, however, it must be, and that must happen at or before the time of invoking the right of appeal.”