“It ought clearly to be understood that it by no means follows that the court will in fact entertain such an appeal. Any application for leave to appeal sentence requires leave and, in this case and no doubt any others like it, an extension of time. The right to appeal given by section 9 of the 1968 Act is subject to section 18 , which requires an application to be lodged within the time stipulated – which is, by section 18(2), 28 days. An extension of time is by no means a formality. It will be granted only where there is good reason to give it, and, ordinarily, where the defendant will otherwise suffer significant injustice. In the very small number of instances in which there has been an earlier reference by the Attorney General, it will be a highly significant factor that it was then open to the defendant to mount any argument that he wished to the effect that his sentence was too long or otherwise wrong in principle. Leave is likely to be refused in any case in which what he now seeks to argue could and should have been argued then. Wholly unmeritorious applications which are no more than an attempt to ventilate second thoughts or to re-litigate decided issues are likely to be met by an order for loss of time under section 29 of the 1968 Act. In all but the wholly exceptional case the decision of this court upon a reference by the Attorney General is, as this court held in Rowan, as much an end of the sentencing process as is its decision upon an application by the defendant under section 9.”