“ … Where a party sensibly agrees to a joint report and the report is obtained as a result of joint instructions in the manner which I have indicated, the fact that a party has agreed to adopt that course does not prevent that party being allowed facilities to obtain a report from another expert or, if appropriate, to rely on the evidence of another expert. In a substantial case such as this, the correct approach is to regard the instruction of an expert jointly by the parties as the first step in obtaining expert evidence on a particular issue. It is to be hoped that in the majority of cases it will not only be the first step but the last step. If, having obtained a joint expert’s report, a party, for reasons which are not fanciful, wishes to obtain further information before making a decision as to whether or not there is a particular part (or indeed the whole) of the expert’s report which he or she may wish to challenge, then they should, subject to the discretion of the court, be permitted to obtain that evidence.”
“Where a party requests a departure from the norm and makes what one can term a Daniels v Walker application, all relevant circumstances are to be taken into account but principally the court must have its eye on the overall justice to the parties. This includes what I have called the balance of grievance test. The application will only succeed in circumstances which are seen to be exceptional and to justify such a departure from the norm.”
“ … The starting point is: unless there is reason for not having a single expert, there should be only a single expert. If there is no reason which justifies more evidence than that from a single expert on any particular topic, then again in the normal way the report prepared by the single expert should be the evidence in the case on the issues covered by that expert’s report. In the normal way, therefore, there should be no need for that report to be amplified or tested by cross-examination. If it needs amplification, or if it should be subject to cross-examination, the court has a discretion to allow that to happen. The court may permit that to happen either prior to the hearing or at the hearing. But the assumption should be that the single joint expert’s report is the evidence. Any amplification or any cross-examination should be restricted as far as possible. Equally, where parties agree that there should be a single joint expert, and a single joint expert produces a report, it is possible for the court still to permit a party to instruct his or her own expert and for that expert to be called at the hearing. However, there must be good reason for that course to be adopted. Normally, where the issue is of the sort that is covered by non-medical evidence, as in this case, the court should be slow to allow a second expert to be instructed.”
“If, having agreed to a joint expert’s report a party subsequently wishes to call evidence, and it would be unjust having regard to the overriding objective of the Civil Procedure Rules not to allow that party to call that evidence, they must be allowed to call it.”