(1) If two or more parties wish to submit expert evidence on a particular issue, the court may direct that expert evidence be given by one expert witness.
(2) The parties referred to in paragraph (1) are known as “the instructing parties”.
(3) If the instructing parties cannot agree who should be the expert witness, the court may —
(a) select the expert witness from a list prepared or identified by the instructing parties; or
(b) direct that the expert witness be selected in such other manner as the court may direct.
(4) The court may vary a direction given under this rule.
(5) The court may appoint a single expert witness instead of the parties instructing their own expert witnesses or may replace expert witnesses instructed by the parties.