"however negligent or careless may have been the first omission, and, however late the proposed amendment, the amendment should be allowed if it can be made without injustice to the other side. There is no injustice if the other side can be compensated by costs; ..."
"This was not a case in which an application had been made to amend during the final speeches and the court was not considering the special nature of a limitation defence. Furthermore, whatever may have been the rule of conduct a hundred years ago, today it is not the practice invariably to allow a defence which is wholly different from that pleaded to be raised by amendment at the end of the trial even on terms that an adjournment is granted and that the defendant pays all the costs thrown away. There is a clear difference between allowing amendments to clarify the issues in dispute and those that permit a distinct defence to be raised for the first time. Whether an amendment should be granted is a matter for the discretion of the trial judge and he should be guided in the exercise of the discretion by his assessment of where justice lies. Many and diverse factors will bear upon the exercise of this discretion. I do not think it possible to enumerate them all or wise to attempt to do so. But justice cannot always be measured in terms of money and in my view a judge is entitled to weigh in the balance the strain the litigation imposes on litigants, particularly if they are personal litigants rather than business corporations, the anxieties occasioned by facing new issues, the raising of false hopes, and the legitimate expectation that the trial will determine the issues one way or the other. Furthermore to allow an amendment before a trial begins is quite different from allowing it at the end of the trial to give an apparently unsuccessful defendant an opportunity to renew the fight on an entirely different defence. Another factor that a judge must weigh in the balance is the pressure on the courts caused by the great increase in litigation and the consequent necessity that, in the interests of the whole community, legal business should be conducted efficiently. We can no longer afford to show the same indulgence towards the negligent conduct of litigation as was perhaps possible in a more leisured age. There will be cases in which justice will be better served by allowing the consequences of the negligence of the lawyers to fall upon their own heads rather than by allowing an amendment at a very late stage of the proceedings."
".... in any trial court it is the trial judge who has control of the proceedings. It is part of his duty to identify the crucial issues and to see they are tried as expeditiously and as inexpensively as possible. It is the duty of the advisers of the parties to assist the trial judge in carrying out his duty. Litigants are not entitled to the uncontrolled use of a trial judge's time. Other litigants await their turn. Litigants are only entitled to so much of the trial judge's time as is necessary for the proper determination of the relevant issues."
"In Banque Keyser Ullman S.A. v Skandia (U.K.) Insurance Co. Ltd. [1991] 2 A.C. 249, 280, I warned against proceedings in which all or some of the litigants indulge in over-elaboration causing difficulties to judges at all levels in the achievement of a just result. I also said that the appellate court should be reluctant to entertain complaints about a judge who controls the conduct of proceedings and limits the time and scope of evidence and argument. So too, where a judge, for reasons which are not plainly wrong makes an interlocutory decision or makes a decision in the course of a trial the decision should be respected by the parties and if not respected should be upheld by an appellate court unless the judge was plainly wrong."
"In my opinion, when a judge alive to the possible consequences, decides that a particular course should be followed in the conduct of the trial in the interests of justice, his decision should be respected by the parties and upheld by an appellate court unless there are very good grounds for thinking that the judge was plainly wrong."