"The issue as to intensity of review 38 The third issue to which I should refer is that which deals with intensity of review. Mr Perry drew attention to the fact that in his submissions he had not relied on the Wednesbury principle. In my judgment it was correct that he should adopt that approach. This case involves the human rights of the claimants. In those circumstances it is only right that the court which originally considers the question of granting an extension should look at the matter with particular care, as the authorities indicate. Equally, when the matter comes before us we must scrutinise it rigorously, but at the same time recognising that the decision is for the judge in the court below to make. Unless we come to the conclusion that he has wrongly exercised his discretion we will not interfere."
"47 Furthermore, in cases where custody time limits are in question, judicial review may disrupt the trial process and lead to satellite litigation, contributing to delay, which is the very feature of criminal litigation which the custody time limits are intended to help minimise. 48 In R v Director of Public Prosecutions, Ex p Kebilene[2000] 2 AC 326 , 371 Lord Steyn said: 'The effect of the judgment of the Divisional Court was to open the door too widely to delay in the conduct of criminal proceedings. Such satellite litigation should rarely be permitted in our criminal justice system.' It is therefore desirable, while recognising the importance of review by this court in exceptional cases, to assert the primacy of the Crown Court judge's role in exercising discretion in relation to custody time limits: see per Lord Bingham CJ in R v Manchester Crown Court, Ex p McDonald[1999] 1 WLR 841 , 850H, already cited at para 17, subject to the need, as Lord Woolf CJ has said, for rigorous scrutiny by the Crown Court judge before custody time limits are extended."
"(3) The appropriate court may, at any time, before the expiry of a time limit imposed by the regulations, extend, or further extend, that limit; but the court shall not do so unless it is satisfied - (a) that the need for the extension is due to - (i) the illness or absence of the accused, a necessary witness, a judge or a magistrate; (ii) a postponement which is occasioned by the ordering by the court of separate trials in the case of two or more accused or two or more offences; or (iii) some other good and sufficient cause; and (b) that the prosecution has acted with all due diligence and expedition."
"If a defendant is unaware that the prosecution has failed to act with all due diligence and expedition, therefore does not oppose an application to extend the custody time limits, should a judge considering a subsequent application to extend the custody time limits only take into account the prosecution's conduct since the last extension was granted in deciding whether the prosecution has acted with all due diligence and expedition?"