Key legal question
Whether the interlocutory order appointing a court expert was separately appealable because the expert's alleged lack of specialist competence caused irreparable harm.
Extracted holding
No separate appeal lay on that ground; the challenge to the expert's qualifications could be raised later against the final decision.
Extracted reasoning
The appointment of an expert does not itself cause irreparable prejudice, and later review of the final merits decision allows the party to renew the objection if needed.