Paragraph 26 Expert witnesses
A party who intends to call a person to give evidence at a hearing as an expert witness must, at least 4 weeks before the date fixed for the hearing (or such other time or date as may be set by the court), intimate to the other parties—
the person’s identity and qualifications; and
the substance of the evidence to be given by the person.
An expert witness is not—
except with the leave of the court; and
on such conditions (if any) as to expenses or otherwise as appear to the court to be appropriate,
to give evidence in examination-in-chief on matters which fall outwith what is contained in the intimation given, as respects that witness, under paragraph (1)(b).
The court may, at any time, order expert witnesses to confer with each other and then prepare and lodge a document setting out any relevant issues upon which they cannot reach agreement; and they are to include in the document a broad statement of why they cannot reach agreement.
The court may make such order as it thinks appropriate (which may be an interim order) as to liability for any expenses incurred in complying with paragraph (3).