[8] On the other hand, the insurer's success on contributory negligence was not complete. It sought a more generous apportionment in its favour than it obtained, presumably with a view to revision of the indemnity costs order made by the trial judge. Furthermore, the plaintiff did not act unreasonably in opposing the insurer's appeal on contributory negligence, as is demonstrated by the fact that the insurer did not obtain an apportionment as generous as that which it sought. Those considerations may not of themselves justify a limitation upon the costs order in favour of the insurer, but to them must be added the consideration that the plaintiff was the successful party in the insurer's appeal on the negligence issue. That was the more substantial issue. A relatively small proportion of the parties' written submissions and oral arguments were devoted to the issue of contributory negligence. Whilst there is some merit in the insurer's argument that it is artificial to divorce the issue of contributory negligence from the issue of the first defendant's negligence, and although the issue of contributory negligence could not be resolved without a full appreciation of the facts underlying the finding of negligence, the appeal on the issue of contributory negligence could have been resolved satisfactorily with reference only to the trial judge's very extensive discussion of the evidence and detailed findings of fact. Some additional reference to the evidence would not have been inappropriate, but the insurer's unsuccessful appeal on the negligence issue required a full record of the trial and it required the parties to embark upon a substantially more extensive examination of the evidence in preparing for and arguing the appeal than otherwise would have been required. Compared to many other appeals, this appeal was not complex and the hearing was conducted with commendable efficiency. Even so, the importance of the appeal for the parties and its complexity was substantially increased by the insurer's challenge to the finding of negligence. The plaintiff's success on that issue should be taken into account in its favour in determining the appropriate costs order.