25 Mr Fletcher's application to amend the statement of claim comes late in the life of these proceedings. It would be wrong in principle to approach his application on the basis of an entitlement to amend, subject to payment of costs by way of compensation to the defendants: see Aon Risk Services Australia Ltd v Australian National University [2009] HCA 27; (2009) 239 CLR 175. All factors relevant to the exercise of the discretion to permit amendment must be weighed including the fact of substantial delay by Mr Fletcher in bringing these amendments before the court, the wasted costs which the amendments might produce, and the effect of the amendments upon the defendants, who have already lost their opportunity to have this case tried on previously fixed dates because of the plaintiff's conduct of these proceedings. Consideration must also be given to the explanation, if any, for the delay in applying for the amendment, the impact of the amendments upon the likely timetable for the resolution of the case, the nature and importance of the amendment to the party applying, its effect upon the breadth of the evidentiary matters to be investigated in the case, and the impact of the amendments upon the limited resources of the court, having regard to the interests of other litigants in the efficient utilisation of those limited resources. This list of considerations is, of course, not meant to be exhaustive, as the breadth of the discretion to be exercised and the variety of circumstances in which applications to amend may be made preclude the prescription of all the factors that might be relevant to all cases.